PHP strncasecmp() Function Usage and Example

　 　 PHP String Manual of String Functions

　 　 The strncasecmp() function is used for binary safe comparison of the first few characters of the string (case-insensitive).

Syntax

strncasecmp(string1,string2,length)

Definition and Usage

It is used to compare two strings (case-insensitive).

Note:strncasecmp() is binary safe and case-insensitive.

Tip:The function is similar tostrcasecmp() The function is similar, but the difference is that strcasecmp() does not have a length parameter, while for the strncasecmp() function, you can specify the length (i.e., maximum comparison length) of the two strings to be compared.

Return Value

　If String1 Less than String2 Return < 0; if String1 Greater than String2 Return > 0; if they are equal, return 0.

Parameter

Online Example

Try the following example, compare two strings (case-insensitive, 'PHP' and 'Php' output is the same)

<?php
//Case-insensitive comparison, 'PHP' and 'Php' output is the same
echo strncasecmp("Hello PHP","Hello PHP",9);
echo "<br>";
//Case-insensitive comparison, 'hello' and 'hELLo' output is the same
echo strncasecmp("hello PHP","hELLo PHP",9);
?>

Output Result

0
0

PHP String Manual of String Functions