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In PHP, you can use the str_replace() function to replace a string at a specified position. The syntax format is "substr_replace(string,replacement,start,length)". The parameter start is used to specify the replacement position (in the string where to start the replacement).
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php replaces the specified location string
<?php $str = 'hello world'; // 替换指定位置的字符 $str = substr_replace($str,"earth",6);; // 显示字符 echo $str; ?>
Output:
hello earth
Related function description:
substr_replace() function replaces part of a string with another string. The syntax is as follows:
substr_replace(string,replacement,start,length)
Description | |
---|---|
string | Required. Specifies the string to check.|
replacement | Required. Specifies the string to be inserted.|
start | Required. Specifies where in the string to begin replacement.
|
length | Optional. Specifies how many characters to replace. The default is the same as the string length.
|
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