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Description

Helper function to check if a file name could match an existing image sub-size file name.

Usage

$bool = _wp_check_existing_file_names( $filename, $files );

Parameters

$filename

( string ) required – The file name to check.

$files

( array ) required – An array of existing files in the directory.

Returns

bool True if the tested file name could match an existing file, false otherwise.

Source

File name: wordpress/wp-includes/functions.php
Lines:

function _wp_check_existing_file_names( $filename, $files ) {
  $fname = pathinfo( $filename, PATHINFO_FILENAME );
  $ext   = pathinfo( $filename, PATHINFO_EXTENSION );

  // Edge case, file names like `.ext`.
  if ( empty( $fname ) ) {
    return false;
  }

  if ( $ext ) {
    $ext = ".$ext";
  }

  $regex = '/^' . preg_quote( $fname ) . '-(?:\d+x\d+|scaled|rotated)' . preg_quote( $ext ) . '$/i';

  foreach ( $files as $file ) {
    if ( preg_match( $regex, $file ) ) {
      return true;
    }
  }

  return false;
}
 

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