strnatcmp String comparisons using a "natural order" algorithm &reftitle.description; intstrnatcmp stringstr1 stringstr2 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; str1 The first string. str2 The second string. &reftitle.returnvalues; Similar to other string comparison functions, this one returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal. &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