php流程控制 break continue
Jun 08, 2016 pm 05:33 PMbreak
break 結(jié)束當(dāng)前 for,foreach,while,do-while 或者 switch 結(jié)構(gòu)的執(zhí)行。
continue
結(jié)束當(dāng)前循環(huán),跳轉(zhuǎn)到下次例:
while(1){
? if( $mrs['lm_name']=='首頁' || $mrs['lm_name']=='論壇'){continue;}
}
break 可以接受一個(gè)可選的數(shù)字參數(shù)來決定跳出幾重循環(huán)。
$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
\n";
}
/* Using the optional argument. */
$i = 0;
while (++$i) {
switch ($i) {
case 5:
echo "At 5
\n";
break 1; /* Exit only the switch. */
case 10:
echo "At 10; quitting
\n";
break 2; /* Exit the switch and the while. */
default:
break;
}
}
?>?
?
?

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