`break`

break 结束当前 for，foreach，while，do..while 或者 switch 结构的执行。

break 可以接受一个可选的数字参数来决定跳出几重循环。


<?php

$arr = array ('one', 'two', 'three', 'four', 'stop', 'five');

while (list (, $val) = each ($arr)) {

    if ($val == 'stop') {

        break;    /* You could also write 'break 1;' here. */

    }

    echo "$val<br>\n";

}



/* Using the optional argument. */



$i = 0;

while (++$i) {

    switch ($i) {

    case 5:

        echo "At 5<br>\n";

        break 1;  /* Exit only the switch. */

    case 10:

        echo "At 10; quitting<br>\n";

        break 2;  /* Exit the switch and the while. */

    default:

        break;

    }

}

?>


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