1 files changed, 34 insertions, 0 deletions
diff --git a/platform/www/lib/plugins/config/core/Setting/SettingRegex.php b/platform/www/lib/plugins/config/core/Setting/SettingRegex.php
new file mode 100644
index 0000000..b38f0a5
--- /dev/null
+++ b/platform/www/lib/plugins/config/core/Setting/SettingRegex.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace dokuwiki\plugin\config\core\Setting;
+
+/**
+ * Class setting_regex
+ */
+class SettingRegex extends SettingString {
+
+    protected $delimiter = '/';    // regex delimiter to be used in testing input
+    protected $pregflags = 'ui';   // regex pattern modifiers to be used in testing input
+
+    /** @inheritdoc */
+    public function update($input) {
+
+        // let parent do basic checks, value, not changed, etc.
+        $local = $this->local;
+        if(!parent::update($input)) return false;
+        $this->local = $local;
+
+        // see if the regex compiles and runs (we don't check for effectiveness)
+        $regex = $this->delimiter . $input . $this->delimiter . $this->pregflags;
+        $lastError = error_get_last();
+        @preg_match($regex, 'testdata');
+        if(preg_last_error() != PREG_NO_ERROR || error_get_last() != $lastError) {
+            $this->input = $input;
+            $this->error = true;
+            return false;
+        }
+
+        $this->local = $input;
+        return true;
+    }
+}