The strcasecmp Function
The strcasecmp function performs a binary-safe case-insensitive string comparison.
The first parameter is the first string to compare, the second is the second string.
The function returns 0 if the strings are identical, a number -1 if the first string is less than the second,
and a number greater than 1 if the first string is greater than the second.
Syntax
strcasecmp(string $str1, string $str2): int
Example
Comparing two identical strings in different cases:
<?php
$res = strcasecmp('Hello', 'hello');
echo $res;
?>
Code execution result:
0
Example
Comparing strings where the first is less than the second:
<?php
$res = strcasecmp('apple', 'banana');
echo $res;
?>
Code execution result:
-1
Example
Comparing strings where the first is greater than the second:
<?php
$res = strcasecmp('zebra', 'apple');
echo $res;
?>
Code execution result:
1
See Also
-
the
strcmpfunction,
which compares strings case-sensitively -
the
strncasecmpfunction,
which compares the first n characters of strings case-insensitively
