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<h1 class="refname">Collator::compare</h1>
<h1 class="refname">collator_compare</h1>
<p class="verinfo">(PHP 5 >= 5.3.0, PECL intl >= 1.0.0)</p><p class="refpurpose"><span class="refname">Collator::compare</span> -- <span class="refname">collator_compare</span> — <span class="dc-title">Compare two Unicode strings</span></p>
</div>
<div class="refsect1 description" id="refsect1-collator.compare-description">
<h3 class="title">Description</h3>
<p class="para">
Object oriented style
</p>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span>
<span class="type">int</span>
<span class="methodname"><strong>Collator::compare</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str1</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$str2</code></span>
)</div>
<p class="para rdfs-comment">
Procedural style
</p>
<div class="methodsynopsis dc-description">
<span class="type">int</span>
<span class="methodname"><strong>collator_compare</strong></span>
( <span class="methodparam"><span class="type"><a href="class.collator.html" class="type Collator">Collator</a></span> <code class="parameter">$coll</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$str1</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$str2</code></span>
)</div>
<p class="para rdfs-comment">
Compare two Unicode strings according to collation rules.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-collator.compare-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">coll</code></em></span>
<dd>
<p class="para">
<a href="class.collator.html" class="classname">Collator</a> object.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">str1</code></em></span>
<dd>
<p class="para">
The first string to compare.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">str2</code></em></span>
<dd>
<p class="para">
The second string to compare.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-collator.compare-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">Return comparison result:</p>
<p class="para">
<ul class="itemizedlist">
<li class="listitem">
<p class="para">
1 if <em><code class="parameter">str1</code></em> is <em class="emphasis">greater</em> than
<em><code class="parameter">str2</code></em> ;
</p>
</li>
<li class="listitem">
<p class="para">
0 if <em><code class="parameter">str1</code></em> is <em class="emphasis">equal</em> to
<em><code class="parameter">str2</code></em>;
</p>
</li>
<li class="listitem">
<p class="para">
-1 if <em><code class="parameter">str1</code></em> is <em class="emphasis">less</em> than
<em><code class="parameter">str2</code></em> .
</p>
</li>
</ul>
On error
<span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span>
<strong><code>FALSE</code></strong>
is returned.
</p>
<div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function may
return Boolean <strong><code>FALSE</code></strong>, but may also return a non-Boolean value which
evaluates to <strong><code>FALSE</code></strong>. Please read the section on <a href="language.types.boolean.html" class="link">Booleans</a> for more
information. Use <a href="language.operators.comparison.html" class="link">the ===
operator</a> for testing the return value of this
function.</p></div>
</div>
<div class="refsect1 examples" id="refsect1-collator.compare-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2489">
<p><strong>Example #1 <span class="function"><strong>collator_compare()</strong></span>example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$s1 </span><span style="color: #007700">= </span><span style="color: #DD0000">'Hello'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$s2 </span><span style="color: #007700">= </span><span style="color: #DD0000">'hello'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$coll </span><span style="color: #007700">= </span><span style="color: #0000BB">collator_create</span><span style="color: #007700">( </span><span style="color: #DD0000">'en_US' </span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">collator_compare</span><span style="color: #007700">( </span><span style="color: #0000BB">$coll</span><span style="color: #007700">, </span><span style="color: #0000BB">$s1</span><span style="color: #007700">, </span><span style="color: #0000BB">$s2 </span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$res </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #0000BB">collator_get_error_message</span><span style="color: #007700">( </span><span style="color: #0000BB">$coll </span><span style="color: #007700">);<br />} else if( </span><span style="color: #0000BB">$res </span><span style="color: #007700">> </span><span style="color: #0000BB">0 </span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"s1 is greater than s2\n"</span><span style="color: #007700">;<br />} else if( </span><span style="color: #0000BB">$res </span><span style="color: #007700">< </span><span style="color: #0000BB">0 </span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"s1 is less than s2\n"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"s1 is equal to s2\n"</span><span style="color: #007700">;<br />}<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 screen"><br />
s1 is greater than s2<br />
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-collator.compare-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="collator.sort.html" class="function" rel="rdfs-seeAlso">collator_sort()</a> - Sort array using specified collator</span></li>
</ul>
</p>
</div>
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