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<?php class Test { private $array = []; public function __construct() { $i = 0; while ($i < 10) { $this->array[$i] = str_repeat(" ", 1e6); $i++; } } public function &variables() { return $this->array; } } echo xdebug_memory_usage() . "\n"; $test = new Test(); echo xdebug_memory_usage() . "\n"; $vars = $test->variables(); echo xdebug_memory_usage() . "\n"; array_search("test", $vars); echo xdebug_memory_usage() . "\n"; //echo xdebug_debug_zval("vars") . "\n";
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function xdebug_memory_usage() in /in/nOi4Y:20 Stack trace: #0 {main} thrown in /in/nOi4Y on line 20
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Fatal error: Call to undefined function xdebug_memory_usage() in /in/nOi4Y on line 20
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/nOi4Y on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/nOi4Y on line 5
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/nOi4Y 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/nOi4Y 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/nOi4Y on line 5
Process exited with code 255.
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