3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { public string $a; public string $b; public function __construct( string $a, string $b, ){ $this->a = $a; $this->b = $b; } } $a = new A('b', 'a'); $b = new A('a', 'b'); var_dump($a <=> $b); // 1 var_dump($b <=> $a); // -1 class B { public string $b; // The property declarations are inverted public string $a; public function __construct( string $a, string $b, ){ $this->a = $a; $this->b = $b; } } $a = new B('b', 'a'); $b = new B('a', 'b'); var_dump($a <=> $b); // -1 var_dump($b <=> $a); // 1
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(1) int(-1) int(-1) int(1)
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected ')', expecting variable (T_VARIABLE) in /in/2nPL6 on line 9
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'string' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/2nPL6 on line 4
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Parse error: syntax error, unexpected 'string' (T_STRING), expecting variable (T_VARIABLE) in /in/2nPL6 on line 4
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 T_STRING, expecting T_VARIABLE in /in/2nPL6 on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING, expecting T_VARIABLE in /in/2nPL6 on line 4
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/2nPL6 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/2nPL6 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/2nPL6 on line 4
Process exited with code 255.
preferences:
40.9 ms | 2716 KiB | 4 Q