init

lib/plugins/shared.mb_str_replace.php

@@ -0,0 +1,87 @@
+<?php
+/**
+ * Smarty shared plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsShared
+ */
+if (!function_exists('smarty_mb_str_replace')) {
+    /**
+     * Multibyte string replace
+     *
+     * @param string|string[] $search  the string to be searched
+     * @param string|string[] $replace the replacement string
+     * @param string          $subject the source string
+     * @param int             &$count  number of matches found
+     *
+     * @return string replaced string
+     * @author Rodney Rehm
+     */
+    function smarty_mb_str_replace($search, $replace, $subject, &$count = 0)
+    {
+        if (!is_array($search) && is_array($replace)) {
+            return false;
+        }
+        if (is_array($subject)) {
+            // call mb_replace for each single string in $subject
+            foreach ($subject as &$string) {
+                $string = smarty_mb_str_replace($search, $replace, $string, $c);
+                $count += $c;
+            }
+        } elseif (is_array($search)) {
+            if (!is_array($replace)) {
+                foreach ($search as &$string) {
+                    $subject = smarty_mb_str_replace($string, $replace, $subject, $c);
+                    $count += $c;
+                }
+            } else {
+                $n = max(count($search), count($replace));
+                while ($n--) {
+                    $subject = smarty_mb_str_replace(current($search), current($replace), $subject, $c);
+                    $count += $c;
+                    next($search);
+                    next($replace);
+                }
+            }
+        } else {
+            $mb_reg_charset = mb_regex_encoding();
+            // Check if mbstring regex is using UTF-8
+            $reg_is_unicode = !strcasecmp($mb_reg_charset, "UTF-8");
+            if(!$reg_is_unicode) {
+                // ...and set to UTF-8 if not
+                mb_regex_encoding("UTF-8");
+            }
+
+            // See if charset used by Smarty is matching one used by regex...
+            $current_charset = mb_regex_encoding();
+            $convert_result = (bool)strcasecmp(Smarty::$_CHARSET, $current_charset);
+            if($convert_result) {
+                // ...convert to it if not.
+                $subject = mb_convert_encoding($subject, $current_charset, Smarty::$_CHARSET);
+                $search = mb_convert_encoding($search, $current_charset, Smarty::$_CHARSET);
+                $replace = mb_convert_encoding($replace, $current_charset, Smarty::$_CHARSET);
+            }
+
+            $parts = mb_split(preg_quote($search), $subject ?? "") ?: array();
+            // If original regex encoding was not unicode...
+            if(!$reg_is_unicode) {
+                // ...restore original regex encoding to avoid breaking the system.
+                mb_regex_encoding($mb_reg_charset);
+            }
+            if($parts === false) {
+                // This exception is thrown if call to mb_split failed.
+                // Usually it happens, when $search or $replace are not valid for given mb_regex_encoding().
+                // There may be other cases for it to fail, please file an issue if you find a reproducible one.
+                throw new SmartyException("Source string is not a valid $current_charset sequence (probably)");
+            }
+
+            $count = count($parts) - 1;
+            $subject = implode($replace, $parts);
+            // Convert results back to charset used by Smarty, if needed.
+            if($convert_result) {
+                $subject = mb_convert_encoding($subject, Smarty::$_CHARSET, $current_charset);
+            }
+        }
+        return $subject;
+    }
+}