php-doc-en/reference/strings/functions/strncmp.xml
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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
<!-- splitted from ./en/functions/strings.xml, last change in rev 1.38 -->
<refentry id="function.strncmp">
<refnamediv>
<refname>strncmp</refname>
<refpurpose>
Binary safe string comparison of the first n characters
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>int</type><methodname>strncmp</methodname>
<methodparam><type>string</type><parameter>str1</parameter></methodparam>
<methodparam><type>string</type><parameter>str2</parameter></methodparam>
<methodparam><type>int</type><parameter>len</parameter></methodparam>
</methodsynopsis>
<para>
This function is similar to <function>strcmp</function>, with the
difference that you can specify the (upper limit of the) number
of characters (<parameter>len</parameter>) from each string to be
used in the comparison. If any of the strings is shorter than
<parameter>len</parameter>, then the length of that string will
be used for the comparison.
</para>
<simpara>
Returns &lt; 0 if <parameter>str1</parameter> is less than
<parameter>str2</parameter>; &gt; 0 if <parameter>str1</parameter>
is greater than <parameter>str2</parameter>, and 0 if they are
equal.
</simpara>
<simpara>
Note that this comparison is case sensitive.
</simpara>
<simpara>
See also <function>ereg</function>,
<function>strncasecmp</function>,
<function>strcasecmp</function>, <function>substr</function>,
<function>stristr</function>, <function>strcmp</function>, and
<function>strstr</function>.
</simpara>
</refsect1>
</refentry>
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