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How to use the replace string function in php: 1. [$search] The string or array to be replaced; 2. [$replace] The string or array to be replaced; 3. [$ subject] The string or array being queried; 4. [$count] is optional. If specified, it will be set to the number of replacements.
php method of using the replace string function:
PHP string replacementstr_replace()
Four ways to use the function, the specific content is as follows:
mixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )
This function returns a string or array. This string or array is the result of replacing all searches in the subject with replace.
1, $search
, the string to be replaced, or array
2, $replace
, the string to be replaced or Array
3, $subject
, the queried string or array
4, $count
, optional, if specified, will Set to the number of times of replacement
5. Return value: This function returns the replaced array or string (newly generated)
<?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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