<?php/*比较两个txt文件，格式如下，分别取出a.txt有的b.txt没有的，b.txt有的a.txt没有的及两个都有的 * a.txt: * A * B * C * D * b.txt * A * B * M * N * result: * only_a.txt * C * D * only_b.txt * M * N * public_a_b.txt * A * B */$curr_file_name = dirname(__FILE__);if (file_exists($curr_file_name . ‘\a.txt‘)) {    $array_a = explode("\r\n", trim(file_get_contents(‘a.txt‘)));}if (file_exists($curr_file_name . ‘\b.txt‘)) {    $array_b = explode("\r\n", trim(file_get_contents(‘b.txt‘)));}if($array_a) {    foreach ($array_a as $value) {        if (!in_array($value, $array_b)) {            $only_a[] = $value;        }    }    file_put_contents("only_a.txt", implode("\r\n", $only_a));}if($array_b) {    $public_a_b = array();    foreach ($array_b as $value) {        if (!in_array($value, $array_a)) {            $only_b[] = $value;        } else {            $public_a_b[] = $value;        }    }    file_put_contents("only_b.txt", implode("\r\n", $only_b));    file_put_contents("public_a_b.txt", implode("\r\n", $public_a_b));}?>