<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Set a constraint on a relation</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.dbplus-errno.html">dbplus_errno</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.dbplus-first.html">dbplus_first</a></div> <div class="up"><a href="ref.dbplus.html">DB++ Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.dbplus-find" class="refentry"> <div class="refnamediv"> <h1 class="refname">dbplus_find</h1> <p class="verinfo">(PHP 4 <= 4.1.0, PECL dbplus >= 0.9)</p><p class="refpurpose"><span class="refname">dbplus_find</span> — <span class="dc-title">Set a constraint on a relation</span></p> </div> <div class="refsect1 description" id="refsect1-function.dbplus-find-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>dbplus_find</strong></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$relation</code></span> , <span class="methodparam"><span class="type">array</span> <code class="parameter">$constraints</code></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$tuple</code></span> )</div> <p class="para rdfs-comment"> Places a constraint on the given <em><code class="parameter">relation</code></em>. </p> <p class="para"> Further calls to functions like <span class="function"><a href="function.dbplus-curr.html" class="function">dbplus_curr()</a></span> or <span class="function"><a href="function.dbplus-next.html" class="function">dbplus_next()</a></span> will only return tuples matching the given constraints. </p> </div> <div class="refsect1 parameters" id="refsect1-function.dbplus-find-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">relation</code></em></span> <dd> <p class="para"> A relation opened by <span class="function"><a href="function.dbplus-open.html" class="function">dbplus_open()</a></span>. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">constraints</code></em></span> <dd> <p class="para"> Constraints are triplets of strings containing of a domain name, a comparison operator and a comparison value. The <em><code class="parameter">constraints</code></em> parameter array may consist of a collection of string arrays, each of which contains a domain, an operator and a value, or of a single string array containing a multiple of three elements. </p> <p class="para"> The comparison operator may be one of the following strings: '==', '>', '>=', '<', '<=', '!=', '~' for a regular expression match and 'BAND' or 'BOR' for bitwise operations. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">tuple</code></em></span> <dd> <p class="para"> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.dbplus-find-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> </p> </div> <div class="refsect1 notes" id="refsect1-function.dbplus-find-notes"> <h3 class="title">Notes</h3> <div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function is <em class="emphasis">EXPERIMENTAL</em>. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk. </p></div> </div> <div class="refsect1 seealso" id="refsect1-function.dbplus-find-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.dbplus-unselect.html" class="function" rel="rdfs-seeAlso">dbplus_unselect()</a> - Remove a constraint from relation</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.dbplus-errno.html">dbplus_errno</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.dbplus-first.html">dbplus_first</a></div> <div class="up"><a href="ref.dbplus.html">DB++ Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>