stream_preview_image

Streams image in post to browser, along with enqueued changes in $_REQUEST['history'].

Description

stream_preview_image( (int) $post_id );

Parameters (1)

0. $post_id (int): The post id.

Usage

if ( !function_exists( 'stream_preview_image' ) ) { 
    require_once ABSPATH . '/wp-admin/includes/image-edit.php'; 
} 
  
// The post id. 
$post_id = -1; 
  
// NOTICE! Understand what this does before running. 
$result = stream_preview_image($post_id);

Defined (1)

The function is defined in the following location(s).

/wp-admin/includes/image-edit.php

function stream_preview_image( $post_id ) { 
    $post = get_post( $post_id ); 
 
    wp_raise_memory_limit( 'admin' ); 
 
    $img = wp_get_image_editor( _load_image_to_edit_path( $post_id ) ); 
 
    if ( is_wp_error( $img ) ) { 
        return false; 
    } 
 
    $changes = !empty($_REQUEST['history']) ? json_decode( wp_unslash($_REQUEST['history']) ) : null; 
    if ( $changes ) 
        $img = image_edit_apply_changes( $img, $changes ); 
 
    // Scale the image. 
    $size = $img->get_size(); 
    $w = $size['width']; 
    $h = $size['height']; 
 
    $ratio = _image_get_preview_ratio( $w, $h ); 
    $w2 = max ( 1, $w * $ratio ); 
    $h2 = max ( 1, $h * $ratio ); 
 
    if ( is_wp_error( $img->resize( $w2, $h2 ) ) ) 
        return false; 
 
    return wp_stream_image( $img, $post->post_mime_type, $post_id ); 
}