How to replace the first character in php

How to replace the first character in php: first create a PHP sample file; then define a "str_replace_limit" method; then implement replacement through if statements and regular matching methods; finally run the file.

PHP replacement, only replace the first matched

function str_replace_limit($search, $replace, $subject, $limit=-1) {
    if (is_array($search)) {
        foreach ($search as $k=>$v) {
        $search[$k] = '`' . preg_quote($search[$k],'`') . '`';
        }
    }
    else {
        $search = '`' . preg_quote($search,'`') . '`';
    }
return preg_replace($search, $replace, $subject, $limit);
}

$search: the string or array to be replaced

$replace: The value to be replaced

$subject: The text to be replaced

$limit: The number to be replaced

Recommended: "PHP Tutorial》

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