Question

stream_preview_image( int $post_id )

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

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description

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参数

$post_id

(int) (Required)

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返回值

(bool)

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源代码

File: 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 );
}

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相关函数

Uses

• wp-includes/functions.php: wp_raise_memory_limit()
• wp-admin/includes/image-edit.php: image_edit_apply_changes()
• wp-admin/includes/image-edit.php: wp_stream_image()
• wp-admin/includes/image.php: _load_image_to_edit_path()
• wp-includes/compat.php: json_decode()
• wp-includes/formatting.php: wp_unslash()
• wp-includes/media.php: wp_get_image_editor()
• wp-includes/post.php: get_post()
• wp-includes/load.php: is_wp_error()
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Used By

• wp-admin/includes/ajax-actions.php: wp_ajax_imgedit_preview()

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User Contributed Notes