strncasecmp
(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)
strncasecmp — Binary safe case-insensitive string comparison of the first n characters
Description
This function is similar to strcasecmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.
Parameters
string1-
The first string.
string2-
The second string.
length-
The length of strings to be used in the comparison.
Return Values
Returns a value less than 0 if string1
is less than string2; a value greater
than 0 if string1 is greater than
string2, and 0 if they
are equal.
No particular meaning can be reliably inferred from the value aside
from its sign.
Changelog
| Version | Description |
|---|---|
| 8.2.0 |
This function is no longer guaranteed to return
strlen($string1) - strlen($string2) when string lengths
are not equal, but may now return -1 or
1 instead.
|
Examples
Example #1 strncasecmp() example
<?php
$var1 = 'Hello John';
$var2 = 'hello Doe';
if (strncasecmp($var1, $var2, 5) === 0) {
echo 'First 5 characters of $var1 and $var2 are equals in a case-insensitive string comparison';
}
?>See Also
- strncmp() - Binary safe string comparison of the first n characters
- preg_match() - Perform a regular expression match
- substr_compare() - Binary safe comparison of two strings from an offset, up to length characters
- strcasecmp() - Binary safe case-insensitive string comparison
- stristr() - Case-insensitive strstr
- substr() - Return part of a string
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