php - 在输入类型文件浏览窗口中只显示图像文件？

Question

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Answer 1

您可以使用它，但它不适用于所有浏览器:

<input type="file" accept="image/*">

在 Chrome 中，您甚至可以指定允许的格式:

<input type="file" accept="image/x-png, image/gif, image/jpeg" />

LIVING DEMO

如果要限制图片类型you can still use JavaScript to validate it在客户端。

当然你也应该用 PHP 在服务器端检查它:

//defining the allowed extensions and types for our system.
$allowedMimes = array('image/gif', 'image/jpeg', 'image/jpg', 'image/png', 'image/bmp', 'image/wbmp');
$allowedExtensions = array('jpg', 'gif', 'jpeg', 'png', 'bmp', 'wbmp');

$extension = end(explode('.',$imgFile));

//is the extension allowed?
if(in_array($extension, $allowedExtensions)){

    //getting the mime type (it can be different from the extension) Be careful!
    $imgInfo = getimagesize('yourPath/'.$imgFile);
    $type = strtolower($imgInfo['mime']);

    //checking the mime type
    if(!in_array($type, $allowedMimes)){
         // is an allowed image type
    }
}