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                ## *break* (PHP 4, PHP 5, PHP 7) *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。 ``` <?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"; } /*?使用可選參數?*/ $i?=?0; while?(++$i)?{ ????switch?($i)?{ ????case?5: ????????echo?"At?5<br?/>\n"; ????????break?1;??/*?只退出?switch.?*/ ????case?10: ????????echo?"At?10;?quitting<br?/>\n"; ????????break?2;??/*?退出?switch?和?while?循環?*/ ????default: ????????break; ????} } ?> ``` ***break* 的更新記錄** | 版本 | 說明 | | --- | --- | | 5.4.0 | *break 0;* 不再合法。這在之前的版本被解析為 *break 1;*。 | | 5.4.0 | 取消變量作為參數傳遞(例如 *$num = 2; break $num;*)。 |
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