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<?php class Foo { public function bar() { echo 'a'; } } $foo = new Foo(); foreach ([['bar']] as $test) { $method = $test[0]; $foo->$method(); // displays "a" ==> success } foreach ([['bar']] as $test) { $foo->$test[0](); // Notice "Array to string conversion" followed by // "Function name must be a string" }
Output for 8.3.0 - 8.3.4
a Warning: Array to string conversion in /in/qdBTj on line 15 Warning: Undefined property: Foo::$Array in /in/qdBTj on line 15 Warning: Trying to access array offset on null in /in/qdBTj on line 15 Fatal error: Uncaught Error: Value of type null is not callable in /in/qdBTj:15 Stack trace: #0 {main} thrown in /in/qdBTj on line 15
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
a Warning: Array to string conversion in /in/qdBTj on line 15 Warning: Undefined property: Foo::$Array in /in/qdBTj on line 15 Warning: Trying to access array offset on value of type null in /in/qdBTj on line 15 Fatal error: Uncaught Error: Value of type null is not callable in /in/qdBTj:15 Stack trace: #0 {main} thrown in /in/qdBTj on line 15
Process exited with code 255.
Output for 7.4.0 - 7.4.33
a Notice: Array to string conversion in /in/qdBTj on line 15 Notice: Undefined property: Foo::$Array in /in/qdBTj on line 15 Notice: Trying to access array offset on value of type null in /in/qdBTj on line 15 Fatal error: Uncaught Error: Function name must be a string in /in/qdBTj:15 Stack trace: #0 {main} thrown in /in/qdBTj on line 15
Process exited with code 255.
Output for 7.3.32 - 7.3.33
a Fatal error: Uncaught Error: Function name must be a string in /in/qdBTj:15 Stack trace: #0 {main} thrown in /in/qdBTj on line 15
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31
a Notice: Array to string conversion in /in/qdBTj on line 15 Notice: Undefined property: Foo::$Array in /in/qdBTj on line 15 Fatal error: Uncaught Error: Function name must be a string in /in/qdBTj:15 Stack trace: #0 {main} thrown in /in/qdBTj on line 15
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
aa
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/qdBTj on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/qdBTj on line 8
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/qdBTj on line 4
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/qdBTj on line 4
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/qdBTj on line 4
Process exited with code 255.

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