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run code in 150+ php & hhvm versions
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<?php $obj = new stdClass; $obj->123a = "foo"; $arr = (array) $obj; var_dump($arr[123a]); // Undefined offset: 123 var_dump($arr["123a"]); // Undefined offset: 123
based on hWQu9
Output for 5.4.0 - 5.4.34
Parse error: syntax error, unexpected '123' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/jsA5T on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER, expecting T_STRING or T_VARIABLE or '{' or '$' in /in/jsA5T on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_LNUMBER, expecting T_STRING or T_VARIABLE or '{' or '$' in /in/jsA5T on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_STRING' or `T_VARIABLE' or `'{'' or `'$'' in /in/jsA5T on line 3
Process exited with code 255.