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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>Set an attribute</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="class.pdo.html">PDO</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="up"><a href="class.pdo.html">PDO</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="pdo.setattribute" class="refentry"> <div class="refnamediv"> <h1 class="refname">PDO::setAttribute</h1> <p class="verinfo">(PHP 5 >= 5.1.0, PECL pdo:0.1-1.0.3)</p><p class="refpurpose"><span class="refname">PDO::setAttribute</span> — <span class="dc-title"> Set an attribute </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>PDO::setAttribute</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$attribute</tt></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$value</tt></span> )</div> <p class="para rdfs-comment"> Sets an attribute on the database handle. Some of the available generic attributes are listed below; some drivers may make use of additional driver specific attributes. <ul class="itemizedlist"> <li class="listitem"><p class="para"> <i>PDO::ATTR_CASE</i>: Force column names to a specific case. <ul class="itemizedlist"> <li class="listitem"><p class="para"> <i>PDO::CASE_LOWER</i>: Force column names to lower case. </p></li> <li class="listitem"><p class="para"> <i>PDO::CASE_NATURAL</i>: Leave column names as returned by the database driver. </p></li> <li class="listitem"><p class="para"> <i>PDO::CASE_UPPER</i>: Force column names to upper case. </p></li> </ul> </p></li> <li class="listitem"><p class="para"><i>PDO::ATTR_ERRMODE</i>: Error reporting. <ul class="itemizedlist"> <li class="listitem"><p class="para"><i>PDO::ERRMODE_SILENT</i>: Just set error codes.</p></li> <li class="listitem"><p class="para"><i>PDO::ERRMODE_WARNING</i>: Raise <a href="errorfunc.constants.html#errorfunc.constants.errorlevels.e-warning" class="link">E_WARNING</a>.</p></li> <li class="listitem"><p class="para"><i>PDO::ERRMODE_EXCEPTION</i>: Throw <a href="language.exceptions.html" class="link">exceptions</a>.</p></li> </ul> </p></li> <li class="listitem"><p class="para"><i>PDO::ATTR_ORACLE_NULLS</i> (available with all drivers, not just Oracle): Conversion of NULL and empty strings. <ul class="itemizedlist"> <li class="listitem"><p class="para"><i>PDO::NULL_NATURAL</i>: No conversion.</p></li> <li class="listitem"><p class="para"><i>PDO::NULL_EMPTY_STRING</i>: Empty string is converted to <b><tt>NULL</tt></b>.</p></li> <li class="listitem"><p class="para"><i>PDO::NULL_TO_STRING</i>: NULL is converted to an empty string.</p></li> </ul> </p></li> <li class="listitem"><p class="para"><i>PDO::ATTR_STRINGIFY_FETCHES</i>: Convert numeric values to strings when fetching. Requires <a href="language.types.boolean.html" class="type bool">bool</a>. </p></li> <li class="listitem"><p class="para"><i>PDO::ATTR_STATEMENT_CLASS</i>: Set user-supplied statement class derived from PDOStatement. Cannot be used with persistent PDO instances. Requires <i>array(string classname, array(mixed constructor_args))</i>. </p></li> <li class="listitem"><p class="para"><i>PDO::ATTR_AUTOCOMMIT</i> (available in OCI, Firebird and MySQL): Whether to autocommit every single statement. </p></li> <li class="listitem"><p class="para"><i>PDO::MYSQL_ATTR_USE_BUFFERED_QUERY</i> (available in MySQL): Use buffered queries. </p></li> </ul> </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><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.pdo.html">PDO</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="up"><a href="class.pdo.html">PDO</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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