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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>Check whether array contains more entries</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.arrayiterator.html">ArrayIterator</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.arrayobject.html">ArrayObject</a></div> <div class="up"><a href="class.arrayiterator.html">ArrayIterator</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="arrayiterator.valid" class="refentry"> <div class="refnamediv"> <h1 class="refname">ArrayIterator::valid</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">ArrayIterator::valid</span> — <span class="dc-title">Check whether array contains more entries</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>ArrayIterator::valid</b></b></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> Checks if the <a href="language.types.array.html" class="type array">array</a> contains any more entries. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para">This function has no parameters.</p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> No value is returned. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>ArrayIterator::valid()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$array </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'1' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'one'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$arrayobject </span><span style="color: #007700">= new </span><span style="color: #0000BB">ArrayObject</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$iterator </span><span style="color: #007700">= </span><span style="color: #0000BB">$arrayobject</span><span style="color: #007700">-></span><span style="color: #0000BB">getIterator</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$iterator</span><span style="color: #007700">-></span><span style="color: #0000BB">valid</span><span style="color: #007700">()); </span><span style="color: #FF8000">//bool(true)<br /><br /></span><span style="color: #0000BB">$iterator</span><span style="color: #007700">-></span><span style="color: #0000BB">next</span><span style="color: #007700">(); </span><span style="color: #FF8000">// advance to the next item<br /><br />//bool(false) because there is only one array element<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$iterator</span><span style="color: #007700">-></span><span style="color: #0000BB">valid</span><span style="color: #007700">());<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.arrayiterator.html">ArrayIterator</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.arrayobject.html">ArrayObject</a></div> <div class="up"><a href="class.arrayiterator.html">ArrayIterator</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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