Bug #81452 [Csd]: if comparison with '==' operator between integer and a string

Edit report at https://bugs.php.net/bug.php?id=81452&edit=1 ID: 81452 User updated by: remy dot dernat at umontpellier dot fr Reported by: remy dot dernat at umontpellier dot fr Summary: if comparison with '==' operator between integer and a string Status: Closed Type: Bug Package: Unknown/Other Function Operating System: linux kernel 5.13.14-100.fc33 PHP Version: 7.4.23 Assigned To: nikic Block user comment: N Private report: N New Comment: Perfect ! Thanks :)) Previous Comments: ------------------------------------------------------------------------ [2021-09-17 09:07:37] nikic@php.net Use PHP 8 ;) https://3v4l.org/lvvg9 ------------------------------------------------------------------------ [2021-09-17 08:59:29] remy dot dernat at umontpellier dot fr Description: ------------ 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: --------------- $str1 = "01/2/21"; //$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: ---------------- Not equal Actual result: -------------- Ok !!! ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81452&edit=1