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run code in 150+ php & hhvm versions
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<?php $fo = 0; var_dump($fo *= 5); $a = range(-2, 2); $b = range(-2, 2, 0.5); $opResults = []; $funcResults = []; $results = []; $t = true; foreach($a as $_a) { foreach($b as $_b) { $opResults[] = $_a ** $_b; $funcResults[] = pow($_a, $_b); if( $_a ** $_b !== pow($_a, $_b)) { var_dump(['**' => $_a ** $_b, 'pow()' => pow($_a, $_b)]); } } } var_dump($opResults === $funcResults);
based on 929rO
Output for 5.6.8 - 7.1.0
int(0) array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } array(2) { ["**"]=> float(NAN) ["pow()"]=> float(NAN) } bool(false)
Output for 5.4.0 - 5.5.35
Parse error: syntax error, unexpected '*' in /in/HJBEq on line 17
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/HJBEq on line 8
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 '[' in /in/HJBEq on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/HJBEq on line 8
Process exited with code 255.