function.mysql-insert-id.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 134 行
HTML
134 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Get the ID generated from the previous INSERT operation</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-info.html">mysql_info</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-list-dbs.html">mysql_list_dbs</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.mysql-insert-id" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysql_insert_id</h1> <p class="verinfo">(PHP 4, PHP 5, PECL mysql:1.0)</p><p class="refpurpose"><span class="refname">mysql_insert_id</span> — <span class="dc-title">Get the ID generated from the previous INSERT operation</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>mysql_insert_id</b></b></span> ([ <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$link_identifier</tt></span> ] )</div> <p class="para rdfs-comment"> Retrieves the ID generated for an AUTO_INCREMENT column by the previous INSERT query. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt><span class="term"><i><tt class="parameter">link_identifier</tt></i></span><dd><p class="para">The MySQL connection. If the link identifier is not specified, the last link opened by <a href="function.mysql-connect.html" class="function">mysql_connect()</a> is assumed. If no such link is found, itwill try to create one as if <a href="function.mysql-connect.html" class="function">mysql_connect()</a> was calledwith no arguments. If by chance no connection is found or established, an<b><tt>E_WARNING</tt></b> level error is generated.</p></dd></dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The ID generated for an AUTO_INCREMENT column by the previous INSERT query on success, <i>0</i> if the previous query does not generate an AUTO_INCREMENT value, or <b><tt>FALSE</tt></b> if no MySQL connection was established. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>mysql_insert_id()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> die(</span><span style="color: #DD0000">'Could not connect: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /></span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'mydb'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO mytable (product) values ('kossu')"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Last inserted record has id %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysql_insert_id</span><span style="color: #007700">());<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <div class="caution"><b class="caution">Caution</b> <p class="para"> <b>mysql_insert_id()</b> converts the return type of the native MySQL C API function <i>mysql_insert_id()</i> to a type of <i>long</i> (named <a href="language.types.integer.html" class="type int">int</a> in PHP). If your AUTO_INCREMENT column has a column type of BIGINT, the value returned by <b>mysql_insert_id()</b> will be incorrect. Instead, use the internal MySQL SQL function <i>LAST_INSERT_ID()</i> in an SQL query. </p> </div> <blockquote><p><b class="note">Note</b>: Because <b>mysql_insert_id()</b> acts on the last performed query, be sure to call <b>mysql_insert_id()</b> immediately after the query that generates the value. <br /> </p></blockquote> <blockquote><p><b class="note">Note</b>: The value of the MySQL SQL function <i>LAST_INSERT_ID()</i> always contains the most recently generated AUTO_INCREMENT value, and is not reset between queries. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.mysql-query.html" class="function" rel="rdfs-seeAlso">mysql_query()</a></li> <li class="member"><a href="function.mysql-info.html" class="function" rel="rdfs-seeAlso">mysql_info()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-info.html">mysql_info</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-list-dbs.html">mysql_list_dbs</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?