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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Binds a value to a parameter</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="pdostatement.bindparam.html">PDOStatement->bindParam</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdostatement.closecursor.html">PDOStatement->closeCursor</a></div> <div class="up"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="pdostatement.bindvalue" class="refentry"> <div class="refnamediv"> <h1 class="refname">PDOStatement->bindValue</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">PDOStatement->bindValue</span> — <span class="dc-title"> Binds a value to a parameter </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>PDOStatement::bindValue</b></b></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$parameter</tt></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$value</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$data_type</tt></span> ] )</div> <p class="para rdfs-comment"> Binds a value to a corresponding named or question mark placeholder in the SQL statement that was use to prepare the statement. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">parameter</tt></i></span> <dd> <p class="para"> Parameter identifier. For a prepared statement using named placeholders, this will be a parameter name of the form <var class="varname">:name</var>. For a prepared statement using question mark placeholders, this will be the 1-indexed position of the parameter. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">value</tt></i></span> <dd> <p class="para"> The value to bind to the parameter. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">data_type</tt></i></span> <dd> <p class="para"> Explicit data type for the parameter using the PDO::PARAM_* constants. Defaults to <b><tt>PDO::PARAM_STR</tt></b>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"><p><b>Example #1 Execute a prepared statement with named placeholders</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* Execute a prepared statement by binding PHP variables */<br /></span><span style="color: #0000BB">$calories </span><span style="color: #007700">= </span><span style="color: #0000BB">150</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$colour </span><span style="color: #007700">= </span><span style="color: #DD0000">'red'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$sth </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT name, colour, calories<br /> FROM fruit<br /> WHERE calories < :calories AND colour = :colour'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">bindValue</span><span style="color: #007700">(</span><span style="color: #DD0000">':calories'</span><span style="color: #007700">, </span><span style="color: #0000BB">$calories</span><span style="color: #007700">, </span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">PARAM_INT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">bindValue</span><span style="color: #007700">(</span><span style="color: #DD0000">':colour'</span><span style="color: #007700">, </span><span style="color: #0000BB">$colour</span><span style="color: #007700">, </span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">PARAM_STR</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <div class="example"><p><b>Example #2 Execute a prepared statement with question mark placeholders</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* Execute a prepared statement by binding PHP variables */<br /></span><span style="color: #0000BB">$calories </span><span style="color: #007700">= </span><span style="color: #0000BB">150</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$colour </span><span style="color: #007700">= </span><span style="color: #DD0000">'red'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$sth </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT name, colour, calories<br /> FROM fruit<br /> WHERE calories < ? AND colour = ?'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">bindValue</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">$calories</span><span style="color: #007700">, </span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">PARAM_INT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">bindValue</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">$colour</span><span style="color: #007700">, </span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">PARAM_STR</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="pdo.prepare.html" class="function" rel="rdfs-seeAlso">PDO::prepare()</a></li> <li class="member"><a href="pdostatement.execute.html" class="function" rel="rdfs-seeAlso">PDOStatement::execute()</a></li> <li class="member"><a href="pdostatement.bindparam.html" class="function" rel="rdfs-seeAlso">PDOStatement::bindParam()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="pdostatement.bindparam.html">PDOStatement->bindParam</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdostatement.closecursor.html">PDOStatement->closeCursor</a></div> <div class="up"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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