{"id":1304,"date":"2013-01-29T00:45:04","date_gmt":"2013-01-29T08:45:04","guid":{"rendered":"http:\/\/www.mysqltutorial.org\/?page_id=1304"},"modified":"2024-01-14T21:23:33","modified_gmt":"2024-01-15T04:23:33","slug":"php-mysql-update-data","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/php-mysql\/php-mysql-update-data\/","title":{"rendered":"PHP MySQL: Update Data"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to update data in a MySQL table using PHP.<\/p>\n\n\n\n<p>To update data in MySQL from PHP, you follow these steps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, <a href=\"https:\/\/www.mysqltutorial.org\/php-mysql\/php-connecting-to-mysql-database\/\">connect to the MySQL server<\/a>.<\/li>\n\n\n\n<li>Second, prepare an <code>UPDATE<\/code> statement.<\/li>\n\n\n\n<li>Third, execute the <code>UPDATE<\/code> statement.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Updating data<\/h2>\n\n\n\n<p>The following <code>update.php<\/code> script sets the value in the <code>completed<\/code> column of row id 1 in the <code>tasks<\/code> table to <code>true<\/code>:<\/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\"><span class=\"hljs-meta\">&lt;?php<\/span>\n<span class=\"hljs-keyword\">require_once<\/span> <span class=\"hljs-string\">'config.php'<\/span>;\n\n<span class=\"hljs-keyword\">try<\/span> {\n    $conn = <span class=\"hljs-keyword\">new<\/span> PDO(<span class=\"hljs-string\">\"mysql:host=$host;dbname=$dbname\"<\/span>, $username, $password);\n    \n    $sql = <span class=\"hljs-string\">'update tasks \n            set completed=:completed \n            where id=:id'<\/span>;\n    \n    $stmt = $conn-&gt;prepare($sql);\n    \n    $stmt-&gt;execute(&#91;<span class=\"hljs-string\">':completed'<\/span> =&gt; <span class=\"hljs-keyword\">true<\/span>, <span class=\"hljs-string\">':id'<\/span> =&gt; <span class=\"hljs-number\">1<\/span>]);\n} <span class=\"hljs-keyword\">catch<\/span> (PDOException $e) {\n    <span class=\"hljs-keyword\">die<\/span>($e);\n}<\/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>How it works.<\/p>\n\n\n\n<p>First, include the <code>config.php<\/code> that contains the database configuration.<\/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-keyword\">require_once<\/span> <span class=\"hljs-string\">'config.php'<\/span>;<\/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<p>Second, establish a new connection to the <code>todo<\/code> database on the MySQL server:<\/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\">$conn = <span class=\"hljs-keyword\">new<\/span> PDO(<span class=\"hljs-string\">\"mysql:host=$host;dbname=$dbname\"<\/span>, $username, $password);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Third, construct an <code>UPDATE<\/code> statement with two parameterized placeholders:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$sql = <span class=\"hljs-string\">'update tasks \n        set completed=:completed \n        where id=:id'<\/span>;<\/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<p>Fourth, prepare the statement for the execution:<\/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\"> $stmt = $conn-&gt;prepare($sql);<\/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>Finally, execute the <code>UPDATE<\/code> statement with data:<\/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\"> $stmt-&gt;execute(&#91;<span class=\"hljs-string\">':completed'<\/span> =&gt; <span class=\"hljs-keyword\">true<\/span>, <span class=\"hljs-string\">':id'<\/span> =&gt; <span class=\"hljs-number\">1<\/span>]);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>If an error occurs, the script displays it and is terminated:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">die<\/span>($e);<\/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<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use a prepared statement to update data in MySQL from PHP.<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful? <\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1304\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/php-mysql\/php-mysql-update-data\/\"\n\t\t\t\tdata-post-title=\"PHP MySQL: Update Data\"\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 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