book_admin/tests/RegexTest.php

<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2019/5/16
 * Time: 下午6:22
 */

class RegexTest extends TestInit
{
    public function testMatch()
    {
        $msg = 'http://sss.d/ssd/';
        $parse = parse_url($msg);
        var_dump(preg_match('/^sss/', $parse['host']));
        var_dump(parse_url($msg));
    }

    public function testReplace()
    {
        $msg = 'aaabbcccaadd';
        $match = ['aa','cc'];
        $replace = ['jj','hh'];
        var_dump($this->replaceOneByOne($msg, $match, $replace));
    }

    public static function replaceOneByOne($string, $fromList, $toList)
    {
        $offset = 0;
        foreach ($fromList as $index => $item) {
            $position = strpos($string, $item, $offset);
            if ($position !== false) {
                $left = substr($string, 0, $position);
                $right = substr($string, $position + strlen($item));
                $middle = $toList[$index];
                $string = $left . $middle . $right;
                $offset = strlen($left . $middle);
            }
        }

        return $string;
    }
}