added date as a safe function

Author: Kharhamel

generator/src/DocPage.php

@@ -112,6 +112,11 @@ public function detectFalsyFunction(): bool
         if (preg_match('/&gd\.return\.identifier;/m', $file)) {
             return true;
         }
+        //used for date
+        if (preg_match('/If a non-numeric value is used for 
+   \<parameter\>timestamp\<\/parameter\>, &false; is returned/m', $file)) {
+            return true;
+        }
 
         //used to detect imagecreatefromstring
         if (preg_match('/If the arguments are invalid, the function returns &false;/m', $file)) {

generator/tests/DocPageTest.php

@@ -18,6 +18,7 @@ public function testDetectFalsyFunction()
         $fsockopen = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/network/functions/fsockopen.xml');
         $arrayReplace = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/array/functions/array-replace.xml');
         $mktime = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/datetime/functions/mktime.xml');
+        $date = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/datetime/functions/date.xml');
 
         $this->assertTrue($pregMatch->detectFalsyFunction());
         $this->assertFalse($implode->detectFalsyFunction());
@@ -29,6 +30,7 @@ public function testDetectFalsyFunction()
         $this->assertTrue($fsockopen->detectFalsyFunction());
         $this->assertFalse($arrayReplace->detectFalsyFunction());
         $this->assertTrue($mktime->detectFalsyFunction());
+        $this->assertTrue($date->detectFalsyFunction());
     }
 
     public function testDetectNullsyFunction()