refactor: add \ for regex string

kenjis · kenjis · commit c873c354ca0e · 2021-12-07T12:51:56.000+09:00
Both the string before and after the change are the same string in PHP, but I got a pattern error when I entered the string before the change in https://regex101.com/.
diff --git a/system/Helpers/array_helper.php b/system/Helpers/array_helper.php
@@ -20,7 +20,8 @@
      */
     function dot_array_search(string $index, array $array)
     {
-        $segments = preg_split('/(?<!\\\)\./', rtrim($index, '* '), 0, PREG_SPLIT_NO_EMPTY);
+        // See https://regex101.com/r/44Ipql/1
+        $segments = preg_split('/(?<!\\\\)\./', rtrim($index, '* '), 0, PREG_SPLIT_NO_EMPTY);
 
         $segments = array_map(static function ($key) {
             return str_replace('\.', '.', $key);

Original file line number	Diff line number	Diff line change
`@@ -20,7 +20,8 @@`
`20`	`20`	`*/`
`21`	`21`	`function dot_array_search(string $index, array $array)`
`22`	`22`	`{`
`23`		`- $segments = preg_split('/(?<!\\\)\./', rtrim($index, '* '), 0, PREG_SPLIT_NO_EMPTY);`
	`23`	`+ // See https://regex101.com/r/44Ipql/1`
	`24`	`+ $segments = preg_split('/(?<!\\\\)\./', rtrim($index, '* '), 0, PREG_SPLIT_NO_EMPTY);`
`24`	`25`
`25`	`26`	`$segments = array_map(static function ($key) {`
`26`	`27`	`return str_replace('\.', '.', $key);`