The str_replace function in php only replaces an instance once_PHP tutorial

PHP's original str_replace function replaces everything. If we want to replace only once, we can refer to the following implementation program to solve the problem. ​

str_replace() function uses a string to replace other characters in a string.

Grammar
str_replace(find,replace,string,count)

参数	描述
find	必需。规定要查找的值。
replace	必需。规定替换 find 中的值的值。
string	必需。规定被搜索的字符串。
count	可选。一个变量，对替换数进行计数。

PHP's one-time replacement function:

The code is as follows

Copy code

代码如下	复制代码
function str_replace_once($needle, $replace, $haystack) { $pos = strpos($haystack, $needle); if ($pos === false) { return $haystack; } return substr_replace($haystack, $replace, $pos, strlen($needle)); }

function str_replace_once($needle, $replace, $haystack) {
$pos = strpos($haystack, $needle);

if ($pos === false) { return $haystack; } return substr_replace($haystack, $replace, $pos, strlen($needle)); }

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truehttp: //www.bkjia.com/PHPjc/445292.htmlTechArticlephp’s original str_replace function replaces all. If we want to replace only once, we can refer to the following implementation program to solve the problem . The str_replace() function uses a string to replace the string...