Add files_preg_match_all helper function

includes/Checker/Checks/Abstract_File_Check.php

@@ -144,7 +144,7 @@ final protected static function file_preg_match( $pattern, array $files, array &
 	/**
 	 * Returns matched files performing a regular expression match on the file contents of the given list of files.
 	 *
-	 * @since n.e.x.t
+	 * @since 1.0.2
 	 *
 	 * @param string $pattern The pattern to search for.
 	 * @param array  $files   List of absolute file paths.
@@ -166,6 +166,44 @@ final protected static function files_preg_match( $pattern, array $files ) {
 		return count( $matched_files ) > 0 ? $matched_files : false;
 	}
 
+	/**
+	 * Returns matched files performing a regular expression match on the file contents of the given list of files with line and column information.
+	 *
+	 * @since 1.0.2
+	 *
+	 * @param string $pattern The pattern to search for.
+	 * @param array  $files   List of absolute file paths.
+	 * @return array|bool Array of file paths and matched string/pattern if matches were found, false otherwise.
+	 */
+	final protected static function files_preg_match_all( $pattern, array $files ) {
+		$matched_files = array();
+
+		foreach ( $files as $file ) {
+			$matches = array();
+
+			$contents = self::file_get_contents( $file );
+
+			preg_match_all( $pattern, $contents, $matches, PREG_OFFSET_CAPTURE );
+
+			if ( is_array( $matches ) && ! empty( $matches ) ) {
+				foreach ( $matches[0] as $match ) {
+					list( $before ) = str_split( $contents, $match[1] );
+
+					$exploded  = explode( PHP_EOL, $before );
+					$last_item = end( $exploded );
+
+					$matched_files[] = array(
+						'file'   => $file,
+						'line'   => count( $exploded ),
+						'column' => strlen( $last_item ) + 1,
+					);
+				}
+			}
+		}
+
+		return count( $matched_files ) > 0 ? $matched_files : false;
+	}
+
 	/**
 	 * Performs a check indicating if the needle is contained in the file contents of the given list of files.
 	 *

includes/Checker/Checks/Localhost_Check.php

@@ -45,15 +45,17 @@ public function get_categories() {
 	 */
 	protected function check_files( Check_Result $result, array $files ) {
 		$php_files = self::filter_files_by_extension( $files, 'php' );
-		$files     = self::files_preg_match( '#https?://(localhost|127.0.0.1)#', $php_files );
+		$files     = self::files_preg_match_all( '#https?://(localhost|127.0.0.1)#', $php_files );
 
 		if ( ! empty( $files ) ) {
 			foreach ( $files as $file ) {
 				$this->add_result_error_for_file(
 					$result,
 					__( 'Do not use Localhost/127.0.0.1 in your code.', 'plugin-check' ),
 					'localhost_code_detected',
-					$file[0]
+					$file['file'],
+					$file['line'],
+					$file['column']
 				);
 			}
 		}