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  • WordPress函数wp_get_attachment_metadata()用法 获取附件的meta数据信息

    正文概述 知事网   2020-09-17   68

    描述:

    获取附件的meta数据信息

    用法:

    <?php wp_get_attachment_metadata( $attachment_id, $unfiltered ); ?>

    参数:

    $attachment_id
    
    (integer) (必填) 附件ID
    
    默认值: None
    
    $unfiltered
    
    (boolean) (可选) 如果为true,则不运行筛选器。
    
    默认值: false
    
    返回值:
    
    Array
    (
    [width] => 2400
    [height] => 1559
    [file] => 2011/12/press_image.jpg
    [sizes] => Array
    (
    [thumbnail] => Array
    (
    [file] => press_image-150x150.jpg
    [width] => 150
    [height] => 150
    [mime-type] => image/jpeg
    )
    [medium] => Array
    (
    [file] => press_image-4-300x194.jpg
    [width] => 300
    [height] => 194
    [mime-type] => image/jpeg
    )
    [large] => Array
    (
    [file] => press_image-1024x665.jpg
    [width] => 1024
    [height] => 665
    [mime-type] => image/jpeg
    )
    [post-thumbnail] => Array
    (
    [file] => press_image-624x405.jpg
    [width] => 624
    [height] => 405
    [mime-type] => image/jpeg
    )
    )
    [image_meta] => Array
    (
    [aperture] => 5
    [credit] =>
    [camera] => Canon EOS-1Ds Mark III
    =>
    [created_timestamp] => 1323190643
    [copyright] =>
    [focal_length] => 35
    [iso] => 800
    [shutter_speed] => 0.016666666666667
    [title] =>
    )
    )

    源文件:

    /**
    * Retrieve attachment meta field for attachment ID.
    *
    * @since 2.1.0
    *
    * @param int $post_id Attachment ID. Default 0.
    * @param bool $unfiltered Optional. If true, filters are not run. Default false.
    * @return mixed Attachment meta field. False on failure.
    */
    function wp_get_attachment_metadata( $post_id = 0, $unfiltered = false ) {
    $post_id = (int) $post_id;
    if ( !$post = get_post( $post_id ) )
    return false;
    
    $data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
    
    if ( $unfiltered )
    return $data;
    
    /**
    * Filter the attachment meta data.
    *
    * @since 2.1.0
    *
    * @param array|bool $data Array of meta data for the given attachment, or false
    * if the object does not exist.
    * @param int $post_id Attachment ID.
    */
    return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
    }
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