Bug #80902 [Opn->Nab]: is_null is not detecting nulls in array created via explode

Edit report at https://bugs.php.net/bug.php?id=80902&edit=1 ID: 80902 Updated by: cmb@php.net Reported by: floriparob at gmail dot com Summary: is_null is not detecting nulls in array created via explode -Status: Open +Status: Not a bug Type: Bug Package: Strings related Operating System: Debian 11 PHP Version: 7.4.16 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php See also <https://3v4l.org/jIB0J>. Previous Comments: ------------------------------------------------------------------------ [2021-03-24 11:16:01] floriparob at gmail dot com Description: ------------ Version: 7.4.15-5+deb11u1 When you explode a string into an array, elements that contain nothing (null) are detectable as such via is_null. The only way to tell is any array element doesn't contain a value is to strlen(trim($a_array[2])) == 0, which gives you the result you want, but is a tad tedious. I'm sure in prior versions is_null($a_array[2] would return true when that array element is empty. I cannot prove or disprove this as I don't have access to an older version of PHP. Test script: --------------- <?php $a_string = "awsed|34r5|||gh||"; $a_array = explode ("|", $a_string); if (is_array($a_array)) { $a_count = count($a_array); echo "Number of Elements " . $a_count . PHP_EOL; for ($i = 0; $i < $a_count; $i++) { if (is_null($a_array[$i])) { echo "Element " . $i . " Is NULL" . PHP_EOL; } else { echo "Element " . $i . " is " . $a_array[$i] . PHP_EOL; } } } else { echo "NOT AN ARRAY" . PHP_EOL; } ?> Expected result: ---------------- Number of Elements 7 Element 0 is awsed Element 1 is 34r5 Element 2 Is NULL Element 3 Is NULL Element 4 is gh Element 5 Is NULL Element 6 Is NULL Actual result: -------------- Number of Elements 7 Element 0 is awsed Element 1 is 34r5 Element 2 is Element 3 is Element 4 is gh Element 5 is Element 6 is ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80902&edit=1