function.array-udiff-assoc.html
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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>Computes the difference of arrays with additional index check, compares data by a callback function</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.array-sum.html">array_sum</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.array-udiff-uassoc.html">array_udiff_uassoc</a></div> <div class="up"><a href="ref.array.html">Array Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.array-udiff-assoc" class="refentry"> <div class="refnamediv"> <h1 class="refname">array_udiff_assoc</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">array_udiff_assoc</span> — <span class="dc-title">Computes the difference of arrays with additional index check, compares data by a callback function</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>array_udiff_assoc</b></b></span> ( <span class="methodparam"><span class="type">array</span> <tt class="parameter">$array1</tt></span> , <span class="methodparam"><span class="type">array</span> <tt class="parameter">$array2</tt></span> [, <span class="methodparam"><span class="type">array</span> <tt class="parameter">$ ...</tt></span> ], <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.callback" class="type callback">callback</a></span> <tt class="parameter">$data_compare_func</tt></span> )</div> <p class="para rdfs-comment"> Computes the difference of arrays with additional index check, compares data by a callback function. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara"> Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, <i>array_udiff_assoc($array1[0], $array2[0], "some_comparison_func");</i>. </span> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">array1</tt></i></span> <dd> <p class="para"> The first array. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">array2</tt></i></span> <dd> <p class="para"> The second array. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">data_compare_func</tt></i></span> <dd> <p class="para"> The callback comparison function. </p> <p class="para"> The user supplied callback function is used for comparison. It must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> <b>array_udiff_assoc()</b> returns an <a href="language.types.array.html" class="type array">array</a> containing all the values from <i><tt class="parameter">array1</tt></i> that are not present in any of the other arguments. Note that the keys are used in the comparison unlike <a href="function.array-diff.html" class="function">array_diff()</a> and <a href="function.array-udiff.html" class="function">array_udiff()</a>. The comparison of arrays' data is performed by using an user-supplied callback. In this aspect the behaviour is opposite to the behaviour of <a href="function.array-diff-assoc.html" class="function">array_diff_assoc()</a> which uses internal function for comparison. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>array_udiff_assoc()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">cr </span><span style="color: #007700">{<br /> private </span><span style="color: #0000BB">$priv_member</span><span style="color: #007700">;<br /> function </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">$val</span><span style="color: #007700">)<br /> {<br /> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">= </span><span style="color: #0000BB">$val</span><span style="color: #007700">;<br /> }<br /><br /> static function </span><span style="color: #0000BB">comp_func_cr</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">)<br /> {<br /> if (</span><span style="color: #0000BB">$a</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">=== </span><span style="color: #0000BB">$b</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member</span><span style="color: #007700">) return </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /> return (</span><span style="color: #0000BB">$a</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member </span><span style="color: #007700">> </span><span style="color: #0000BB">$b</span><span style="color: #007700">-></span><span style="color: #0000BB">priv_member</span><span style="color: #007700">)? </span><span style="color: #0000BB">1</span><span style="color: #007700">:-</span><span style="color: #0000BB">1</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #0000BB">$a </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"0.1" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">9</span><span style="color: #007700">), </span><span style="color: #DD0000">"0.5" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">12</span><span style="color: #007700">), </span><span style="color: #0000BB">0 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">23</span><span style="color: #007700">), </span><span style="color: #0000BB">1</span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">4</span><span style="color: #007700">), </span><span style="color: #0000BB">2 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(-</span><span style="color: #0000BB">15</span><span style="color: #007700">),);<br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"0.2" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">9</span><span style="color: #007700">), </span><span style="color: #DD0000">"0.5" </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">22</span><span style="color: #007700">), </span><span style="color: #0000BB">0 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">3</span><span style="color: #007700">), </span><span style="color: #0000BB">1</span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(</span><span style="color: #0000BB">4</span><span style="color: #007700">), </span><span style="color: #0000BB">2 </span><span style="color: #007700">=> new </span><span style="color: #0000BB">cr</span><span style="color: #007700">(-</span><span style="color: #0000BB">15</span><span style="color: #007700">),);<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_udiff_assoc</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"cr"</span><span style="color: #007700">, </span><span style="color: #DD0000">"comp_func_cr"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>Array( [0.1] => cr Object ( [priv_member:private] => 9 ) [0.5] => cr Object ( [priv_member:private] => 12 ) [0] => cr Object ( [priv_member:private] => 23 ))</pre></div> </pre></div> </div> </p> <p class="simpara"> In our example above you see the <i>"1" => new cr(4)</i> pair is present in both arrays and thus it is not in the ouput from the function. </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.array-diff.html" class="function" rel="rdfs-seeAlso">array_diff()</a></li> <li class="member"><a href="function.array-diff-assoc.html" class="function" rel="rdfs-seeAlso">array_diff_assoc()</a></li> <li class="member"><a href="function.array-diff-uassoc.html" class="function" rel="rdfs-seeAlso">array_diff_uassoc()</a></li> <li class="member"><a href="function.array-udiff.html" class="function" rel="rdfs-seeAlso">array_udiff()</a></li> <li class="member"><a href="function.array-udiff-uassoc.html" class="function" rel="rdfs-seeAlso">array_udiff_uassoc()</a></li> <li class="member"><a href="function.array-intersect.html" class="function" rel="rdfs-seeAlso">array_intersect()</a></li> <li class="member"><a href="function.array-intersect-assoc.html" class="function" rel="rdfs-seeAlso">array_intersect_assoc()</a></li> <li class="member"><a href="function.array-uintersect.html" class="function" rel="rdfs-seeAlso">array_uintersect()</a></li> <li class="member"><a href="function.array-uintersect-assoc.html" class="function" rel="rdfs-seeAlso">array_uintersect_assoc()</a></li> <li class="member"><a href="function.array-uintersect-uassoc.html" class="function" rel="rdfs-seeAlso">array_uintersect_uassoc()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.array-sum.html">array_sum</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.array-udiff-uassoc.html">array_udiff_uassoc</a></div> <div class="up"><a href="ref.array.html">Array Functions</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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