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<?php function getRef(&$var) { } function &returnRef1() { $a = 5; return $a; } function returnNonRef1() { $a = 5; return $a; } class A{ static function &returnRef2() { $a = 5; return $a; } function &returnRef3() { $a = 5; return $a; } } getRef(returnRef1()); getRef(A::returnRef2()); getRef((new A())->returnRef3()); getRef(returnNonRef1()); echo "Done\n";
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Notice: Only variables should be passed by reference in /in/enq8m on line 26 Done
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Notice: Only variables should be passed by reference in /in/enq8m on line 26 Done
Output for 7.3.32 - 7.3.33, 7.4.26
Done

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134.95 ms | 401 KiB | 173 Q