wp-admin/includes/media.php:2425Outputs the legacy media upload form for external media.
$typestringoptionalnull$errorsobjectoptionalnull$idintoptionalnull3 hooks fire while media_upload_type_url_form() runs, in this order:
Filters the media upload form action URL.
Filters whether to disable captions.
Filters the insert media from URL form HTML.
function media_upload_type_url_form( $type = null, $errors = null, $id = null ) { if ( null === $type ) { $type = 'image'; } media_upload_header(); $post_id = isset( $_REQUEST['post_id'] ) ? (int) $_REQUEST['post_id'] : 0; $form_action_url = admin_url( "media-upload.php?type=$type&tab=type&post_id=$post_id" ); /** This filter is documented in wp-admin/includes/media.php */ $form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type ); $form_class = 'media-upload-form type-form validate'; if ( get_user_setting( 'uploader' ) ) { $form_class .= ' html-uploader'; } ?> <form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form"> <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" /> <?php wp_nonce_field( 'media-form' ); ?> <h3 class="media-title"><?php _e( 'Insert media from another website' ); ?></h3> <script> var addExtImage = { width : '', height : '', align : 'alignnone', insert : function() { var t = this, html, f = document.forms[0], cls, title = '', alt = '', caption = ''; if ( '' === f.src.value || '' === t.width ) return false; if ( f.alt.value ) alt = f.alt.value.replace(/'/g, ''').replace(/"/g, '"').replace(/</g, '<').replace(/>/g, '>'); <?php /** This filter is documented in wp-admin/includes/media.php */ if ( ! apply_filters( 'disable_captions', '' ) ) { ?> if ( f.caption.value ) { caption = f.caption.value.replace(/\r\n|\r/g, '\n'); caption = caption.replace(/<[a-zA-Z0-9]+( [^<>]+)?>/g, function(a){ return a.replace(/[\r\n\t]+/, ' '); }); caption = caption.replace(/\s*\n\s*/g, '<br />'); } <?php } ?> cls = caption ? '' : ' class="'+t.align+'"'; html = '<img alt="'+alt+'" src="'+f.src.value+'"'+cls+' width="'+t.width+'" height="'+t.height+'" />'; if ( f.url.value ) { url = f.url.value.replace(/'/g, ''').replace(/"/g, '"').replace(/</g, '<').replace(/>/g, '>'); html = '<a href="'+url+'">'+html+'</a>'; } if ( caption ) html = '[caption id="" align="'+t.align+'" width="'+t.width+'"]'+html+caption+'[/caption]'; var win = window.dialogArguments || opener || parent || top; win.send_to_editor(html); return false; }, resetImageData : function() { var t = addExtImage; t.width = t.height = ''; document.getElementById('go_button').style.color = '#bbb'; if ( ! document.forms[0].src.value )Introduced in 2.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.