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                break 結束當前 for,foreach,while,do-while 或者 switch 結構的執行。 break 可以接受一個可選的數字參數來決定跳出幾重循環。 編輯`/home/project/break.php` ~~~php <?php $i = 0; while (++$i) { for ($j = 0;$j < 10;$j++) { switch ($i) { case 1: echo "At 1".PHP_EOL; break 2; case 5: echo "At 5".PHP_EOL; break 2; case 10: echo "At 10; quitting".PHP_EOL; break 3; default: break; } } } ~~~ 執行 ~~~bash php break.php ~~~ 從結果可以看到,break 帶參數可以指定跳出幾重循環。
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