A method to realize automatic renaming of pictures uploaded by WordPress

When we use WordPress When you post , Often you need to add pictures 、 Multimedia or something .

However , Everybody knows WordPress It's an import , For Chinese users , We all name the pictures in Chinese , because WordPress The reason for the mechanism , It doesn't normally display pictures or various problems .

that , How to make WordPress The picture is automatically renamed and displayed normally ？

Now? , Let's talk about something more grounded WordPress skill , When we upload pictures , It can automatically change the name of the picture into English or numbers .

Specifically, it is named according to the upload time and MD5 The transcoding file name is 32 Two file naming methods of bit string , You can only choose one .

One 、 Name according to the upload time

function custom_upload_filter( $file ){
    $info = pathinfo($file['name']);
    $ext = $info['extension'];
    $filedate = date('YmdHis').rand(10,99);// To avoid repetition of time , Add another paragraph 2 Random number of bits 
    $file['name'] = $filedate.'.'.$ext;
    return $file;
}
add_filter('wp_handle_upload_prefilter', 'custom_upload_filter' );

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Two 、 file name md5 Transcode as 32 A string

function custom_upload_filter( $file ){
    $info = pathinfo($file['name']);
    $ext = '.' . $info['extension'];
    $md5 = md5($file['name']);
    $file['name'] = $md5.$ext;
    return $file;
}
add_filter('wp_handle_upload_prefilter', 'custom_upload_filter' );

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Edible method

Add code to the... Of the topic you are using functions.php In the file .

The above two methods are implemented WordPress You can only choose one of two ways to upload an image and rename it automatically , Do not use both methods at the same time , Otherwise, if you make mistakes, you will bear the consequences .