<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>使用break關鍵字跳出多重迴圈</title><style type="text/css"><!--body {background-color: #CCFF00;}--></style></head><body><?phpwhile(true){for(;;){for($i=1;$i<=4;$i++){echo $i." <img src='images/$i.jpg'>"."\t";if($i == 3){echo "<p>變數\$i等於3，跳出一重迴圈。<p>";break 1;}}for($j = 1; $j < 5; $j++){echo $j." <img src='images/$j.jpg'>"."\t";if($j == 4){echo "<p>變數\$j等於4，跳出最外重迴圈。";break 3;}}}echo "看不到我吧，呵呵!";}?> </body></html>
二 運行結果
三 注意事項
本執行個體共3層迴圈，最外層的while迴圈和中間的for迴圈是無限迴圈，最裡面並列兩個for迴圈：程式首先執行第1個迴圈，迴圈3次，跳出當前迴圈（一重迴圈），然後繼續執行第二個for迴圈，迴圈4次，然後跳出最外層的迴圈（體會break後的數位含義，跳出針對自己的第3層迴圈）。
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