略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: Imagick::valid

2024-04-29

Imagick::valid

(PECL imagick 2, PECL imagick 3)

Imagick::validChecks if the current item is valid

说明

public Imagick::valid(): bool

Checks if the current item is valid.

参数

此函数没有参数。

返回值

成功时返回 true

add a noteadd a note

User Contributed Notes 1 note

up
1
hyrumt at mediarain dot com
12 years ago
We found this method to be of value when checking most image file types. However, it does not appear to be rigorous enough to detect corrupt jpg files. We use the following for jpgs and validate() for everything else.

<?php
   
// check for the existence of the EOI segment header at the end of the file
   
if (0 !== fseek($file, -2, SEEK_END) || "\xFF\xD9" !== fread($file, 2)) {
       
fclose($file);
        return
FALSE;
    }
?>

官方地址:https://www.php.net/manual/en/imagick.valid.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3