The strnatcasecmp() function (case-insensitive) used for compare two strings using a "natural order" algorithm.
Syntax
strnatcasecmp(string1,string2)
Return value
Example
echo strnatcasecmp("Hello dear","Hello Dear!");
echo strnatcasecmp("Hello dear!","Hello Dear!");
echo strnatcasecmp("Hello dear!","Hello Dear");
Output
-1
0
1
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