Doc #80685 [NEW]: array_merge - odd behaviour with string keys

From: raddi at gmx dot net Operating system: Ubuntu 20.04 / Windows PHP version: Irrelevant Package: Unknown/Other Function Bug Type: Documentation Problem Bug description:array_merge - odd behaviour with string keys Description: ------------ Test-script below is expected to output the following (according to documentation at https://www.php.net/manual/de/function.array-merge.php) as the keys of the input-arrays are strings Array ( [54984941951919] => aa [549849419519193] => bb ) I get this result only on my old Raspberry running PHP 7.3.19-1~deb10u1. On other servers (Windows witth 7.4.14; Docker with 7.4.14, 8.0.1, 7.3.19 and 7.3.26; even on an Ubuntu 20.04 with 7.3.19-1~deb10u1) the result is Array ( [0] => aa [1] => bb ) with is for arrays with numeric keys. Yes, the keys from Test-script can be converted to integer but was defined as string key. At least I expect a consistent behaviour on all PHP-versions and a hint within the documentation about string keys beeing convertable to integers. I've found some older bugs (#25470, #18075, #13478, #54140) about this behaviour with #54140 stating that in the manual I should read "Strings containing valid integers will be cast to the integer type." but right now it is not in the mentioned documentation anymore. Test script: --------------- $arra = array('54984941951919'=>'aa'); $arrb = array('549849419519193'=>'bb'); echo '<pre>'; print_r( array_merge($arra, $arrb) ); Expected result: ---------------- Array ( [54984941951919] => aa [549849419519193] => bb ) Actual result: -------------- Array ( [0] => aa [1] => bb ) -- Edit bug report at https://bugs.php.net/bug.php?id=80685&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80685&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80685&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80685&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80685&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80685&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80685&r=support Expected behavior: https://bugs.php.net/fix.php?id=80685&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80685&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80685&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80685&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80685&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80685&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80685&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80685&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80685&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80685&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80685&r=mysqlcfg