php字串替換函數substr_replace()用法執行個體_php技巧

本文執行個體講述了php字串替換函數substr_replace()用法。分享給大家供大家參考。具體分析如下：

substr_replace用於在指定字串中替換指定位置的子字串

<?php$string = "Warning: System will shutdown in NN minutes!";$pos = strpos($string, "NN");print(substr_replace($string, "15", $pos, 2)."\n");sleep(10*60);print(substr_replace($string, "5", $pos, 2)."\n");?>

上面代碼輸入如下結果

Warning: System will shutdown in 15 minutes!(10 minutes later)Warning: System will shutdown in 5 minutes!

希望本文所述對大家的php程式設計有所協助。