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<?php /* Default from the book */ $a = range(3,9); foreach ($a as $b) { switch($b) { case 3: $b = 7; case 7: $b = 3; default: // do nothing } } echo implode('-',$a) . PHP_EOL; // Excerpt From: Lorna Mitchell. “Zend Certification Preparation Pack.” iBooks. /* Suggested alternate method from the book */ $a = range(3,9); foreach ($a as $key => $b) { switch($b) { case 3: $a[$key] = 7; case 7: $a[$key] = 3; default: // do nothing } } echo implode('-',$a) - PHP_EOL; /* Second alternate by using $b by reference */ $a = range(3,9); foreach ($a as &$b) { switch($b) { case 3: $b = 7; case 7: $b = 3; default: // do nothing } } echo implode('-',$a);
Output for git.master, git.master_jit, rfc.property-hooks
3-4-5-6-7-8-9 Warning: A non-numeric value encountered in /in/DddcB on line 35 Fatal error: Uncaught TypeError: Unsupported operand types: string - string in /in/DddcB:35 Stack trace: #0 {main} thrown in /in/DddcB on line 35
Process exited with code 255.

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