Bug #78612 [Opn->Ver]: strtr leaks memory when integer keys are used and the subject string shorter

Edit report at https://bugs.php.net/bug.php?id=78612&edit=1 ID: 78612 Updated by: nikic@php.net Reported by: itsoft3g at gmail dot com Summary: strtr leaks memory when integer keys are used and the subject string shorter -Status: Open +Status: Verified Type: Bug Package: Strings related Operating System: Ubuntu 18.04.2 LTS PHP Version: 7.3.10 Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2019-09-30 12:27:08] itsoft3g at gmail dot com Description: ------------ Passing 2nd argument as an array to strtr() - replace substrings Here array keys are integers. Say an interger (7111222333000001) is the find item, consider it as string its length is 16. Say the subject is Hello which length is 5. In this case, strtr leaks memory. However, when the subject is longer than the find item, there is no memory leak. Also when the find is string there too no memory leak. Test script: --------------- $find_replace = array(); $_a = 7111222333000001;//find - consider as string it's length is 16 $_b = 5000001; for($j=0;$j<10;$j++){ $find_replace[$_a + $j] = $_b + $j; } function test_strtr($subject, $find_replace){ $memory_before = memory_get_usage(); for($i=0;$i<50000;$i++){ strtr($subject, $find_replace); } echo round( (memory_get_usage() - $memory_before) /(1024*1024), 4 ).' MB '; } test_strtr('Hello', $find_replace);//subject is shorter then find(length 5), memory leaks test_strtr('Lorem ipsum dolor', $find_replace);//subject is lengthier then find(length 17), no memory leak ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78612&edit=1