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<?php class MemoryLeak { public function bad() { $closure = function ($this) {}; $closure([$this]); } public function good1() { $closure = function ($param) {}; $closure([$this]); } public function good2() { $closure = function ($this) {}; $closure($this); } } $object = new MemoryLeak; $usage = 0; ini_set('memory_limit', '10M'); for ($i = 0; $i < 1000000; ++$i) { $object->bad(); } echo "Done" . PHP_EOL;
Output for 7.0.7 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
Fatal error: Cannot use $this as parameter in /in/lr963 on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.6
Fatal error: Allowed memory size of 10485760 bytes exhausted (tried to allocate 20480 bytes) in /in/lr963 on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28
Done
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/lr963 on line 8
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/lr963 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/lr963 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lr963 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lr963 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/lr963 on line 5
Process exited with code 255.
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46.22 ms | 417 KiB | 5 Q