Imagick
在线手册：中文 英文
PHP手册

Imagick::valid

(PECL imagick 2.0.0)

Imagick::valid — Checks if the current item is valid

说明

bool Imagick::valid ( void )

Checks if the current item is valid.

返回值

成功时返回 TRUE .

Imagick
在线手册：中文 英文
PHP手册
PHP手册 - N: Checks if the current item is valid

用户评论:

hyrumt at mediarain dot com (11-Feb-2010 07:01)

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;
    }
?>