strnatcmp String comparisons using a "natural order" algorithm &reftitle.description; intstrnatcmp stringstring1 stringstring2 This function implements a comparison algorithm that orders alphanumeric strings in the way a human being would, this is described as a "natural ordering". Note that this comparison is case sensitive. &reftitle.parameters; string1 The first string. string2 The second string. &reftitle.returnvalues; Similar to other string comparison functions, this one returns -1 if string1 is less than string2; 1 if string1 is greater than string2, and 0 if they are equal. &reftitle.changelog; &Version; &Description; &standard.changelog.binary-safe-string-comparison; &reftitle.examples; An example of the difference between this algorithm and the regular computer string sorting algorithms (used in strcmp) can be seen below: ]]> &example.outputs; img1.png [1] => img10.png [2] => img12.png [3] => img2.png ) Natural order string comparison Array ( [0] => img1.png [1] => img2.png [2] => img10.png [3] => img12.png ) ]]> For more information see: Martin Pool's Natural Order String Comparison page. &reftitle.seealso; preg_match strcasecmp substr stristr strcmp strncmp strncasecmp strnatcasecmp strstr natsort natcasesort