PHP compares two strings of function strcasecmp ()

Instance

Compare two strings (case insensitive):

<?phpecho strcasecmp ("Hello world!", "Hello world!");? >

Definition and usage

The strcasecmp () function compares two strings.

Tip: the strcasecmp () function is binary safe and is case-insensitive.

Tip: This function is similar to the strncasecmp () function, but by strncasecmp () you can specify the number of characters each string is used to compare.

Grammar

STRCASECMP (STRING1,STRING2)

Parameters	Describe
String1	Necessary. Specifies the first string to compare.
string2	Necessary. Specifies a second string to compare.

Technical details

return value:	This function returns: 0-if two strings are equal <0-if string1 is less than string2 >0-if string1 is greater than string2
php version:	4+

More examples

Example 1

Compare two strings (case insensitive, hello and hello output are the same):

<?phpecho strcasecmp ("Hello", "Hello"), echo "<br>", Echo strcasecmp ("Hello", "Hello"); >

Example 2

Different return values:

<?phpecho strcasecmp ("Hello world!", "Hello world!"); The strings is Equalecho strcasecmp ("Hello world!", "Hello"); String1 is greater than String2echo strcasecmp ("Hello world!", "Hello world! Hello! "); String1 is less than string2?>

strcasecmp-binary Security comparison string (case insensitive)

int strcasecmp (String $str 1, String $str 2)

return value:

Returns a negative number if the str1 is less than str2, returns a positive number if the STR1 is greater than str2, and returns 0 if they are equal.

Simple example:

<?php$var1 = "Hello"; $var 2 = "Hello"; if (strcasecmp ($var 1, $var 2) = = 0) {    echo ' $var 1 is equal to $var 2 in a case-i Nsensitive string comparison ';}? >