{"id":1530,"date":"2021-05-08T03:18:19","date_gmt":"2021-05-08T03:18:19","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=1530"},"modified":"2021-05-08T03:19:57","modified_gmt":"2021-05-08T03:19:57","slug":"php-str_starts_with","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_starts_with\/","title":{"rendered":"PHP str_starts_with"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PHP <code>str_starts_with()<\/code> function to check if a string starts with a substring.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-php-str_starts_with-function'>Introduction to the PHP str_starts_with() function <a href=\"#introduction-to-the-php-str_starts_with-function\" class=\"anchor\" id=\"introduction-to-the-php-str_starts_with-function\" title=\"Anchor for Introduction to the PHP str_starts_with() function\">#<\/a><\/h2>\n\n\n\n<p>The <code>str_starts_with()<\/code> function performs a case-senstive search and checks if a <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-string\/\">string<\/a> starts with a substring:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">str_starts_with ( string $haystack , string $needle ) : bool<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>str_starts_with()<\/code> function has two parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>$haystack<\/code> is the input string to check.<\/li><li><code>$needle<\/code> is the substring to search for in the input string.<\/li><\/ul>\n\n\n\n<p>The <code>str_starts_with()<\/code> function returns true if the <code>$haystack<\/code> starts with the <code>$needle<\/code> or <code>false<\/code> otherwise.<\/p>\n\n\n\n<p>The <code>str_starts_with()<\/code> function has been available since PHP 8.0.0. If you use a lower version of PHP, you can polyfill the function like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n<span class=\"hljs-keyword\">if<\/span> (!function_exists(<span class=\"hljs-string\">'str_starts_with'<\/span>)) {\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title\">str_starts_with<\/span><span class=\"hljs-params\">($haystack, $needle)<\/span> <\/span>{\n        <span class=\"hljs-keyword\">return<\/span> (string)$needle !== <span class=\"hljs-string\">''<\/span> &amp;&amp; strncmp($haystack, $needle, strlen($needle)) === <span class=\"hljs-number\">0<\/span>;\n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><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<h2 class=\"wp-block-heading\" id='php-str_starts_with-function-examples'>PHP str_starts_with() function examples <a href=\"#php-str_starts_with-function-examples\" class=\"anchor\" id=\"php-str_starts_with-function-examples\" title=\"Anchor for PHP str_starts_with() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the PHP <code>str_starts_with()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-using-php-str_starts_with-function-with-single-character-example'>1) Using PHP str_starts_with() function with single character example <a href=\"#1-using-php-str_starts_with-function-with-single-character-example\" class=\"anchor\" id=\"1-using-php-str_starts_with-function-with-single-character-example\" title=\"Anchor for 1) Using PHP str_starts_with() function with single character example\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the PHP <code>str_starts_with()<\/code> function to check if the string <code>'PHP tutorial'<\/code> starts with the letter <code>'P'<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$str = <span class=\"hljs-string\">'PHP tutorial'<\/span>;\n$substr = <span class=\"hljs-string\">'P'<\/span>;\n\n$result = str_starts_with($str, $substr) ? <span class=\"hljs-string\">'is'<\/span> : <span class=\"hljs-string\">'is not'<\/span>;\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"The $str $result starting with $substr\"<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">The PHP tutorial is starting with P<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='2-using-the-php-str_starts_with-function-with-multiple-characters-example'>2) Using the PHP str_starts_with() function with multiple characters example <a href=\"#2-using-the-php-str_starts_with-function-with-multiple-characters-example\" class=\"anchor\" id=\"2-using-the-php-str_starts_with-function-with-multiple-characters-example\" title=\"Anchor for 2) Using the PHP str_starts_with() function with multiple characters example\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the PHP <code>str_starts_with()<\/code> function to check if the string <code>'PHP tutorial'<\/code> starts with the string <code>'PHP'<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$str = <span class=\"hljs-string\">'PHP tutorial'<\/span>;\n$substr = <span class=\"hljs-string\">'PHP'<\/span>;\n\n$result = str_starts_with($str, $substr) ? <span class=\"hljs-string\">'is'<\/span> : <span class=\"hljs-string\">'is not'<\/span>;\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"The $str $result starting with $substr\"<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">The PHP tutorial is starting with PHP<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='2-case-sensitive-example'>2) Case-sensitive example <a href=\"#2-case-sensitive-example\" class=\"anchor\" id=\"2-case-sensitive-example\" title=\"Anchor for 2) Case-sensitive example\">#<\/a><\/h3>\n\n\n\n<p>It&#8217;s important to keep in mind that the <code>str_starts_with()<\/code> function performs a case-sensitive search. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$str = <span class=\"hljs-string\">'PHP tutorial'<\/span>;\n$substr = <span class=\"hljs-string\">'php'<\/span>;\n\n$result = str_starts_with($str, $substr) ? <span class=\"hljs-string\">'is'<\/span> : <span class=\"hljs-string\">'is not'<\/span>;\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"The $str $result starting with $substr\"<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><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>Output:<\/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\">The PHP tutorial is not starting with php<\/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<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\"><li>Use the PHP <code>str_starts_with()<\/code> function to perform a case-sensitive search and check if a string starts with a substring.<\/li><\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Did you find this tutorial useful?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1530\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_starts_with\/\"\n\t\t\t\tdata-post-title=\"PHP str_starts_with\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"1530\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_starts_with\/\"\n\t\t\t\tdata-post-title=\"PHP str_starts_with\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summary: in this tutorial, you&#8217;ll learn how to use the PHP str_starts_with() function to check if a string starts with a substring. Introduction to the PHP str_starts_with() function # The str_starts_with() function performs a case-senstive search and checks if a string starts with a substring: The str_starts_with() function has two parameters: $haystack is the input [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15,"menu_order":118,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1530","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/comments?post=1530"}],"version-history":[{"count":2,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1530\/revisions"}],"predecessor-version":[{"id":1532,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1530\/revisions\/1532"}],"up":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/15"}],"wp:attachment":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/media?parent=1530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}