编辑文件：hidden.php
<?php add_action( 'wpcf7_init', 'wpcf7_add_form_tag_hidden', 10, 0 ); function wpcf7_add_form_tag_hidden() { wpcf7_add_form_tag( 'hidden', 'wpcf7_hidden_form_tag_handler', array( 'name-attr' => true, 'display-hidden' => true, ) ); } function wpcf7_hidden_form_tag_handler( $tag ) { if ( empty( $tag->name ) ) { return ''; } $atts = array(); $class = wpcf7_form_controls_class( $tag->type ); $atts['class'] = $tag->get_class_option( $class ); $atts['id'] = $tag->get_id_option(); $value = (string) reset( $tag->values ); $value = $tag->get_default_option( $value ); $atts['value'] = $value; $atts['type'] = 'hidden'; $atts['name'] = $tag->name; $atts = wpcf7_format_atts( $atts ); $html = sprintf( '<input %s />', $atts ); return $html; }
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