{"id":75,"date":"2021-03-08T00:13:09","date_gmt":"2021-03-08T00:13:09","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=75"},"modified":"2025-04-06T02:55:59","modified_gmt":"2025-04-06T02:55:59","slug":"php-array","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-array\/","title":{"rendered":"PHP Array"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn about PHP arrays and how to manipulate array elements effectively.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-php-arrays'>Introduction to PHP arrays <a href=\"#introduction-to-php-arrays\" class=\"anchor\" id=\"introduction-to-php-arrays\" title=\"Anchor for Introduction to PHP arrays\">#<\/a><\/h2>\n\n\n\n<p>By definition, an array is a list of elements. For example, you may have an array that contains a list of products.<\/p>\n\n\n\n<p>PHP provides you with two types of arrays:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Indexed arrays<\/li>\n\n\n\n<li><a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-associative-arrays\/\">Associative arrays<\/a><\/li>\n<\/ul>\n\n\n\n<p>The keys of the indexed array are integers that start at 0. Typically, you use indexed arrays to access the elements by their positions.<\/p>\n\n\n\n<p>The keys of an associative array are strings. You use associative arrays when you want to access elements by string keys.<\/p>\n\n\n\n<p>This tutorial focuses on the indexed array.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='creating-arrays'>Creating arrays <a href=\"#creating-arrays\" class=\"anchor\" id=\"creating-arrays\" title=\"Anchor for Creating arrays\">#<\/a><\/h2>\n\n\n\n<p>In PHP, you can use the <code>array()<\/code> construct or <code>[]<\/code> syntax to define an array. The <code>[]<\/code> syntax is shorter and more convenient.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='creating-an-array-using-the-array-construct'>Creating an array using the array() construct <a href=\"#creating-an-array-using-the-array-construct\" class=\"anchor\" id=\"creating-an-array-using-the-array-construct\" title=\"Anchor for Creating an array using the array() construct\">#<\/a><\/h3>\n\n\n\n<p>To define an array, you use the <code>array()<\/code> construct. The following example creates an empty array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$empty_array = <span class=\"hljs-keyword\">array<\/span>();<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>To create an array with some initial elements, you place a comma-separated list of elements within parentheses of the <code>array()<\/code> construct.<\/p>\n\n\n\n<p>For example, the following defines an array that has three numbers:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = <span class=\"hljs-keyword\">array<\/span>(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='creating-an-array-using-the-syntax'>Creating an array using the [] syntax <a href=\"#creating-an-array-using-the-syntax\" class=\"anchor\" id=\"creating-an-array-using-the-syntax\" title=\"Anchor for Creating an array using the [] syntax\">#<\/a><\/h3>\n\n\n\n<p>PHP provides a more convenient way to define arrays with the shorter syntax <code>[]<\/code>, known as JSON notation. <\/p>\n\n\n\n<p>The following example uses <code>[]<\/code> syntax to create a new empty array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$empty_array = &#91;];<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following example uses the <code>[]<\/code> syntax to create a new array that consists of three numbers:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='displaying-arrays'>Displaying arrays <a href=\"#displaying-arrays\" class=\"anchor\" id=\"displaying-arrays\" title=\"Anchor for Displaying arrays\">#<\/a><\/h2>\n\n\n\n<p>To show the contents of an array, you use the <code><a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-var_dump\/\">var_dump()<\/a><\/code> function. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\nvar_dump($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CnZhcl9kdW1wKCRzY29yZXMpOw\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">array<\/span>(<span class=\"hljs-number\">3<\/span>) {\n  &#91;<span class=\"hljs-number\">0<\/span>]=&gt; int(<span class=\"hljs-number\">1<\/span>)\n  &#91;<span class=\"hljs-number\">1<\/span>]=&gt; int(<span class=\"hljs-number\">2<\/span>)\n  &#91;<span class=\"hljs-number\">2<\/span>]=&gt; int(<span class=\"hljs-number\">3<\/span>)\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Or you can use the <code>print_r()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = <span class=\"hljs-keyword\">array<\/span>(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>);\nprint_r($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBhcnJheSgxLCAyLCAzKTsKcHJpbnRfcigkc2NvcmVzKTs\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">Array<\/span>\n(\n    &#91;<span class=\"hljs-number\">0<\/span>] =&gt; <span class=\"hljs-number\">1<\/span>\n    &#91;<span class=\"hljs-number\">1<\/span>] =&gt; <span class=\"hljs-number\">2<\/span>\n    &#91;<span class=\"hljs-number\">2<\/span>] =&gt; <span class=\"hljs-number\">3<\/span>\n)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>To make the output more readable, you can wrap the output of the <code>print_r()<\/code> function inside a <code>&lt;pre&gt;<\/code> tag. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">'&lt;pre&gt;'<\/span>;\nprint_r($scores);\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">'&lt;\/pre&gt;'<\/span>;<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CgplY2hvICc8cHJlPic7CnByaW50X3IoJHNjb3Jlcyk7CmVjaG8gJzwvcHJlPic7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">Array<\/span>\n(\n    &#91;<span class=\"hljs-number\">0<\/span>] =&gt; <span class=\"hljs-number\">1<\/span>\n    &#91;<span class=\"hljs-number\">1<\/span>] =&gt; <span class=\"hljs-number\">2<\/span>\n    &#91;<span class=\"hljs-number\">2<\/span>] =&gt; <span class=\"hljs-number\">3<\/span>\n)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>It&#8217;s more convenient to define a function that prints out an array like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title\">print_array<\/span><span class=\"hljs-params\">($data)<\/span>\n<\/span>{\n\t<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">'&lt;pre&gt;'<\/span>;\n\tprint_r($data);\n\t<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">'&lt;\/pre&gt;'<\/span>;\n}\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n\nprint_array($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCmZ1bmN0aW9uIHByaW50X2FycmF5KCRkYXRhKQp7CgllY2hvICc8cHJlPic7CglwcmludF9yKCRkYXRhKTsKCWVjaG8gJzwvcHJlPic7Cn0KCiRzY29yZXMgPSBbMSwgMiwgM107CgpwcmludF9hcnJheSgkc2NvcmVzKTs\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">Array<\/span>\n(\n    &#91;<span class=\"hljs-number\">0<\/span>] =&gt; <span class=\"hljs-number\">1<\/span>\n    &#91;<span class=\"hljs-number\">1<\/span>] =&gt; <span class=\"hljs-number\">2<\/span>\n    &#91;<span class=\"hljs-number\">2<\/span>] =&gt; <span class=\"hljs-number\">3<\/span>\n)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>And then you can reuse the function whenever you want to display an array.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='accessing-array-elements'>Accessing array elements <a href=\"#accessing-array-elements\" class=\"anchor\" id=\"accessing-array-elements\" title=\"Anchor for Accessing array elements\">#<\/a><\/h2>\n\n\n\n<p>To access an element in an array, you specify the index of the element within the square brackets:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$array_name&#91;index]<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Note that the index of the first element of an array begins with zero, not one.<\/p>\n\n\n\n<p>The following example shows how to access the first element of the array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n<span class=\"hljs-keyword\">echo<\/span> $scores&#91;<span class=\"hljs-number\">0<\/span>];<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CmVjaG8gJHNjb3Jlc1swXTs\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">1<\/code><\/span><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='adding-an-element-to-the-array'>Adding an element to the array <a href=\"#adding-an-element-to-the-array\" class=\"anchor\" id=\"adding-an-element-to-the-array\" title=\"Anchor for Adding an element to the array\">#<\/a><\/h2>\n\n\n\n<p>To add an element to an array, you use the following syntax:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-15\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$array_name&#91;] = new_element;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>PHP will calculate the highest numerical index plus one each time you assign an element to the array.<\/p>\n\n\n\n<p>The following example shows how to add the number <code>4<\/code> to the <code>$scores<\/code> array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-16\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n$scores&#91;] = <span class=\"hljs-number\">4<\/span>;\n\nprint_r($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-16\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CiRzY29yZXNbXSA9IDQ7CgpwcmludF9yKCRzY29yZXMpOw\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>In this example, we defined an array that consists of three numbers initially. Then, we added the number 4 to the array.<\/p>\n\n\n\n<p>It&#8217;s possible to use an index when you add a new element to the array. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-17\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n$scores&#91;<span class=\"hljs-number\">3<\/span>] = <span class=\"hljs-number\">4<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-17\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>However, to do this, you must manually calculate the new index, which is not practical. Also, the value will be overwritten if the index is already used.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='changing-array-elements'>Changing array elements <a href=\"#changing-array-elements\" class=\"anchor\" id=\"changing-array-elements\" title=\"Anchor for Changing array elements\">#<\/a><\/h2>\n\n\n\n<p>The following statement changes the element located at the <code>index<\/code> to the <code>$new_element<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-18\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$array_name&#91;index] = $new_element;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-18\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For example, to change the first element of the <code>$scores<\/code> array from 1 to zero, you do it as follows:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-19\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n$scores&#91;<span class=\"hljs-number\">0<\/span>] = <span class=\"hljs-number\">0<\/span>;\n\nprint_r($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-19\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CiRzY29yZXNbMF0gPSAwOwoKcHJpbnRfcigkc2NvcmVzKTs\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='removing-array-elements'>Removing array elements <a href=\"#removing-array-elements\" class=\"anchor\" id=\"removing-array-elements\" title=\"Anchor for Removing array elements\">#<\/a><\/h2>\n\n\n\n<p>To remove an element from an array, you use the <code>unset()<\/code> function. The following removes the second element of the <code>$scores<\/code> array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-20\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\n<span class=\"hljs-keyword\">unset<\/span>($scores&#91;<span class=\"hljs-number\">1<\/span>]);\n\nprint_r($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-20\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgM107CnVuc2V0KCRzY29yZXNbMV0pOwoKcHJpbnRfcigkc2NvcmVzKTs\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='getting-the-size-of-an-array'>Getting the size of an array <a href=\"#getting-the-size-of-an-array\" class=\"anchor\" id=\"getting-the-size-of-an-array\" title=\"Anchor for Getting the size of an array\">#<\/a><\/h2>\n\n\n\n<p>To get the number of elements in an array, you use the <code>count()<\/code> function. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-21\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$scores = &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">4<\/span>, <span class=\"hljs-number\">5<\/span>];\n\n<span class=\"hljs-keyword\">echo<\/span> count($scores);<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-21\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRzY29yZXMgPSBbMSwgMiwgMywgNCwgNV07CgplY2hvIGNvdW50KCRzY29yZXMpOw\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">5<\/code><\/span><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>array()<\/code> construct or <code>[]<\/code> syntax to create a new array.<\/li>\n\n\n\n<li>For the indexed array, the first index begins with zero.<\/li>\n\n\n\n<li>To access an array element, use an index in the square bracket <code>$array_name[index]<\/code>.<\/li>\n\n\n\n<li>Use the <code>count()<\/code> function to get the number of elements in an array.<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Did you find this 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