如果您查看文档str_replace 你会找到你的需要。https://www.php.net/manual/en/function.str-replace.php

这里有3种选择：

function replace_text_wps($text){
    $replace = array(
        \'https://www.facebook.com/something">\' => \'https://www.instagram.com/something">\',
    );
    $text = str_replace(array_keys($replace), array_values($replace), $text);

    // OR
    $text = str_replace(array(
        \'https://www.facebook.com/something">\'
    ), array(
        \'https://www.instagram.com/something">\'
    ), $text);
    
    // OR 
    $text = str_replace(\'https://www.facebook.com/something">\', \'https://www.instagram.com/something">\', $text);
        
    return $text;
}
 
add_filter(\'the_content\', \'replace_text_wps\',99, 1);