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<?php namespace Contactable\SWV; class FileRule extends Rule { const rule_name = 'file'; public function matches( $context ) { if ( false === parent::matches( $context ) ) { return false; } if ( empty( $context['file'] ) ) { return false; } return true; } public function validate( $context ) { $field = $this->get_property( 'field' ); $input = $_FILES[$field]['name'] ?? ''; $input = wpcf7_array_flatten( $input ); $input = wpcf7_exclude_blank( $input ); $acceptable_filetypes = array(); foreach ( (array) $this->get_property( 'accept' ) as $accept ) { if ( preg_match( '/^\.[a-z0-9]+$/i', $accept ) ) { $acceptable_filetypes[] = strtolower( $accept ); } else { foreach ( wpcf7_convert_mime_to_ext( $accept ) as $ext ) { $acceptable_filetypes[] = sprintf( '.%s', strtolower( trim( $ext, ' .' ) ) ); } } } $acceptable_filetypes = array_unique( $acceptable_filetypes ); foreach ( $input as $i ) { $last_period_pos = strrpos( $i, '.' ); if ( false === $last_period_pos ) { // no period return $this->create_error(); } $suffix = strtolower( substr( $i, $last_period_pos ) ); if ( ! in_array( $suffix, $acceptable_filetypes, true ) ) { return $this->create_error(); } } return true; } }
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