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<?php
class WPCF7_SWV_FileRule extends WPCF7_SWV_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 = isset( $_FILES[$field]['name'] ) ? $_FILES[$field]['name'] : '';
$input = wpcf7_array_flatten( $input );
$input = wpcf7_exclude_blank( $input );
$acceptable_filetypes = array();
foreach ( (array) $this->get_property( 'accept' ) as $accept ) {
if ( false === strpos( $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 new WP_Error( 'wpcf7_invalid_file',
$this->get_property( 'error' )
);
}
$suffix = strtolower( substr( $i, $last_period_pos ) );
if ( ! in_array( $suffix, $acceptable_filetypes, true ) ) {
return new WP_Error( 'wpcf7_invalid_file',
$this->get_property( 'error' )
);
}
}
return true;
}
}