Description:
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I have a generic function which is comparing two string.

The success string in my code is "1" (an integer actually). Sometimes, the comparing string is something like a date DD/MM/YY or MM/DD/YY. If the first two characters are 1 or 01 it will result in a succeeded condition.

I do not want to test if the compared string is a date or not, because, as I previously said, I may have many values, and I still want a Ok result if I compare int "1" to "01" or "1" string (so, I do not want to use "===").

Is there something special with "/" character, which creates such an issue ? Indeed, if I try to do a cast from this special string to a float it results in the "1" value anyway.

Test script:
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$str1 = "01/2/21";
//$str1 = "01";
$str2 = 1;

if($str1 == $str2) {
	echo "Ok !!!\n";
} else { echo "Not equal\n"; }

//echo var_dump($str1);
//echo "\n";
//echo var_dump($str2);
//echo "\n";

Expected result:
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Not equal


Actual result:
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Ok !!!