{"id":1374,"date":"2013-01-29T20:05:05","date_gmt":"2013-01-30T04:05:05","guid":{"rendered":"http:\/\/www.mysqltutorial.org\/?page_id=1374"},"modified":"2024-01-04T00:04:04","modified_gmt":"2024-01-04T07:04:04","slug":"php-calling-mysql-stored-procedures","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/php-mysql\/php-calling-mysql-stored-procedures\/","title":{"rendered":"PHP MySQL: Call MySQL Stored Procedures"},"content":{"rendered":"\n<p><strong>Summary<\/strong><em>: <\/em>In this tutorial, you will learn how to call MySQL stored procedures from PHP, including stored procedures that accept IN &amp; OUT parameters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Creating stored procedures<\/h2>\n\n\n\n<p>The following creates a <a href=\"https:\/\/www.mysqltutorial.org\/mysql-stored-procedure\/getting-started-with-mysql-stored-procedures\/\">stored procedure<\/a> <code>GetAllTasks()<\/code> that retrieves all rows from the <code>tasks<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">DELIMITER $$\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> GetAllTasks()\n<span class=\"hljs-keyword\">BEGIN<\/span>\n\t<span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> tasks;\n<span class=\"hljs-keyword\">END<\/span>$$\n\nDELIMITER ;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following creates a stored procedure <code>GetTaskStatus()<\/code> that returns the status of a task based on its ID:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">DELIMITER $$\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">PROCEDURE<\/span> GetTaskStatus(\n    <span class=\"hljs-keyword\">in<\/span>  p_id <span class=\"hljs-built_in\">int<\/span>, \n    <span class=\"hljs-keyword\">out<\/span> p_completed <span class=\"hljs-built_in\">bool<\/span>\n)    \n<span class=\"hljs-keyword\">BEGIN<\/span>\n    <span class=\"hljs-keyword\">DECLARE<\/span> task_status <span class=\"hljs-built_in\">bool<\/span>;\n    \n    <span class=\"hljs-keyword\">SELECT<\/span> completed <span class=\"hljs-keyword\">INTO<\/span> p_completed\n    <span class=\"hljs-keyword\">FROM<\/span> tasks\n    <span class=\"hljs-keyword\">WHERE<\/span> <span class=\"hljs-keyword\">id<\/span> = p_id;\n<span class=\"hljs-keyword\">END<\/span>$$\n\nDELIMITER ;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"calling-stored-procedures-that-return-a-result-set\">Calling stored procedures that return result sets<\/h2>\n\n\n\n<p>To call a stored procedure that returns a result set, 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 database<\/a>.<\/li>\n\n\n\n<li>Second, execute a statement that calls the stored procedure using the <code>query()<\/code> method.<\/li>\n\n\n\n<li>Third, fetch all rows from the result set.<\/li>\n<\/ul>\n\n\n\n<p>The following PHP script illustrates how to call the stored procedure <code>GetAllTasks()<\/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<span class=\"hljs-keyword\">require_once<\/span> <span class=\"hljs-string\">'config.php'<\/span>;\n\n<span class=\"hljs-keyword\">try<\/span> {\n    <span class=\"hljs-comment\">\/\/ connect to MySQL server<\/span>\n    $conn = <span class=\"hljs-keyword\">new<\/span> PDO(<span class=\"hljs-string\">\"mysql:host=$host;dbname=$dbname\"<\/span>, $username, $password);\n    \n    <span class=\"hljs-comment\">\/\/ execute a query<\/span>\n    $sql = <span class=\"hljs-string\">'CALL GetAllTasks()'<\/span>;\n    $stmt = $conn-&gt;query($sql);\n    $stmt-&gt;setFetchMode(PDO::FETCH_ASSOC);\n\n    <span class=\"hljs-comment\">\/\/ process the results<\/span>\n    $tasks = &#91;];\n    <span class=\"hljs-keyword\">while<\/span> ($row = $stmt-&gt;fetch()) {\n        $tasks&#91;] = &#91;\n            <span class=\"hljs-string\">'title'<\/span> =&gt; $row&#91;<span class=\"hljs-string\">'title'<\/span>],\n            <span class=\"hljs-string\">'completed'<\/span> =&gt; $row&#91;<span class=\"hljs-string\">'completed'<\/span>] == <span class=\"hljs-number\">0<\/span> ? <span class=\"hljs-keyword\">false<\/span> : <span class=\"hljs-keyword\">true<\/span>\n        ];\n    }\n    \n    <span class=\"hljs-comment\">\/\/ display the task list<\/span>\n    <span class=\"hljs-keyword\">require<\/span> <span class=\"hljs-string\">'select.view.php'<\/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-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<h2 class=\"wp-block-heading\" id=\"calling-stored-procedures-with-an-out-parameter\">Calling stored procedures with an OUT parameter<\/h2>\n\n\n\n<p>The following script calls the <code>GetTaskStatus()<\/code> stored procedure that accepts a task ID and returns the task&#8217;s status:<\/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\"><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    <span class=\"hljs-comment\">\/\/ connect to MySQL server<\/span>\n    $conn = <span class=\"hljs-keyword\">new<\/span> PDO(<span class=\"hljs-string\">\"mysql:host=$host;dbname=$dbname\"<\/span>, $username, $password);\n    \n    <span class=\"hljs-comment\">\/\/ call the GetTaskStatus<\/span>\n    $sql = <span class=\"hljs-string\">'CALL GetTaskStatus(:id, @task_status)'<\/span>;\n    $stmt = $conn-&gt;prepare($sql);\n\n    <span class=\"hljs-comment\">\/\/ bind the task id<\/span>\n    $task_id = <span class=\"hljs-number\">1<\/span>;\n    $stmt-&gt;bindParam(<span class=\"hljs-string\">':id'<\/span>, $task_id, PDO::PARAM_INT);\n\n    <span class=\"hljs-comment\">\/\/ execute the query &amp; close the cursor<\/span>\n    $stmt-&gt;execute();\n    $stmt-&gt;closeCursor();\n\n    <span class=\"hljs-comment\">\/\/ execute the second query to get the task status<\/span>\n    $row = $conn-&gt;query(<span class=\"hljs-string\">'SELECT @task_status AS task_status'<\/span>)-&gt;fetch(PDO::FETCH_ASSOC);\n    <span class=\"hljs-keyword\">if<\/span> ($row) {\n        <span class=\"hljs-keyword\">echo<\/span> $row !== <span class=\"hljs-keyword\">false<\/span> ? $row&#91;<span class=\"hljs-string\">'task_status'<\/span>] : <span class=\"hljs-keyword\">null<\/span>;\n    }\n} <span class=\"hljs-keyword\">catch<\/span> (PDOException $e) {\n    <span class=\"hljs-keyword\">die<\/span>($e);\n}\n<\/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>How it works.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, execute a query that calls a stored procedure and save the out parameter into a session variable <code>@task_status<\/code>.<\/li>\n\n\n\n<li>Second, execute a second query that retrieves the value from the <code>@task_status<\/code> variable.<\/li>\n<\/ul>\n\n\n\n<p>Note that the script returns the status of the task with id 1.<\/p>\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=\"1374\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/php-mysql\/php-calling-mysql-stored-procedures\/\"\n\t\t\t\tdata-post-title=\"PHP MySQL: Call MySQL Stored Procedures\"\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 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