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php替换字符串用什么函数

时间:2021-07-01 10:21:17 帮助过:24人阅读

下面通过本文给大家分享PHP字符串替换str_replace()函数4种用法,具体内容如下所示:

mixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )

该函数返回一个字符串或者数组。该字符串或数组是将subject中全部的search都被replace替换之后的结果。

1、$search,要替换的字符串,或数组(推荐学习:PHP编程从入门到精通)

2、$replace,被用来替换的字符串或数组

3、$subject,被查询的字符串或数组

4、$count,可选,如果被指定,将为设置为替换的次数

5、返回值:该函数返回替换后的数组或者字符串(新生成的)

<?php
  //实例一:字符串替换字符串
  $str1 = str_replace("red","black","red green yellow pink purple");
  echo $str1."";  //
输出结果为black green yellow pink purple ?> <?php //实例二:字符串替换数组键值 $arr = array("blue","red","green","yellow"); $str1 = str_replace("red","pink",$arr,$i); print_r($str1); ?> <?php //实例三:数组替换数组,映射替换 $arr1 = array("banana","orange"); $arr2 = array("pitaya","tomato"); $con_arr = array("apple","orange","banana","grape"); $con_rep = str_replace($arr1,$arr2,$con_arr,$count); print_r($con_rep); ?> <?php //实例四:如$search为数组,$replace为字符串时 $search = array("banana","grape"); $replace = "tomato"; $arr = array("banana","apple","orange","grape"); $new_arr = str_replace($search,$replace,$arr,$count); print_r($new_arr); ?>

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