(PHP 4 >= 4.0.5, PHP 5, PHP 7)
Locale based string comparison
int strcoll ( string $str1, string $str2 )
Note that this comparison is case sensitive, and unlike strcmp() this function is not binary safe.
strcoll() uses the current locale for doing the comparisons. If the current locale is C or POSIX, this function is equivalent to strcmp().
Parameters:
str1
The first