diff --git a/generated/functionsList.php b/generated/functionsList.php
index b1c28d6f..3c537d1f 100644
--- a/generated/functionsList.php
+++ b/generated/functionsList.php
@@ -337,6 +337,7 @@
     'imagecreatefromgif',
     'imagecreatefromjpeg',
     'imagecreatefrompng',
+    'imagecreatefromstring',
     'imagecreatefromtga',
     'imagecreatefromwbmp',
     'imagecreatefromwebp',
diff --git a/generated/image.php b/generated/image.php
index 91342964..639cf16c 100644
--- a/generated/image.php
+++ b/generated/image.php
@@ -911,6 +911,30 @@ function imagecreatefrompng(string $filename)
 }
 
 
+/**
+ * imagecreatefromstring returns an image identifier
+ * representing the image obtained from the given data.
+ * These types will be automatically detected if your build of PHP supports
+ * them: JPEG, PNG, GIF, BMP, WBMP, GD2, and WEBP.
+ *
+ * @param string $data A string containing the image data.
+ * @return resource An image object will be returned on success. FALSE is returned if
+ * the image type is unsupported, the data is not in a recognised format,
+ * or the image is corrupt and cannot be loaded.
+ * @throws ImageException
+ *
+ */
+function imagecreatefromstring(string $data)
+{
+    error_clear_last();
+    $result = \imagecreatefromstring($data);
+    if ($result === false) {
+        throw ImageException::createFromPhpError();
+    }
+    return $result;
+}
+
+
 /**
  * imagecreatefromtga returns an image object
  * representing the image obtained from the given filename.
diff --git a/generator/src/DocPage.php b/generator/src/DocPage.php
index 9af68225..9354428d 100644
--- a/generator/src/DocPage.php
+++ b/generator/src/DocPage.php
@@ -125,7 +125,7 @@ public function detectFalsyFunction(): bool
         }
 
         //used to detect imagecreatefromstring
-        if (preg_match('/If the arguments are invalid, the function returns &false;/m', $returnValuesSection)) {
+        if (preg_match('/&false; is returned if\s+the image type is unsupported, the data is not in a recognised format,\s+or the image is corrupt and cannot be loaded/m', $returnValuesSection)) {
             return true;
         }
 
diff --git a/generator/tests/DocPageTest.php b/generator/tests/DocPageTest.php
index 5f449c41..6a2ab878 100644
--- a/generator/tests/DocPageTest.php
+++ b/generator/tests/DocPageTest.php
@@ -21,6 +21,7 @@ public function testDetectFalsyFunction()
         $classImplement = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/spl/functions/class-implements.xml');
         $getHeaders = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/url/functions/get-headers.xml');
         $gzopen = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/zlib/functions/gzopen.xml');
+        $fopen = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/image/functions/imagecreatefromstring.xml');
         //$ldapSearch = new DocPage(__DIR__ . '/../doc/doc-en/en/reference/ldap/functions/ldap-search.xml');
 
         $this->assertTrue($pregMatch->detectFalsyFunction());
@@ -36,6 +37,7 @@ public function testDetectFalsyFunction()
         $this->assertTrue($classImplement->detectFalsyFunction());
         $this->assertTrue($getHeaders->detectFalsyFunction());
         $this->assertTrue($gzopen->detectFalsyFunction());
+        $this->assertTrue($fopen->detectFalsyFunction());
         //$this->assertTrue($ldapSearch->detectFalsyFunction());
     }
 
diff --git a/rector-migrate.php b/rector-migrate.php
index e8c0da9f..efa2a286 100644
--- a/rector-migrate.php
+++ b/rector-migrate.php
@@ -347,6 +347,7 @@
             'imagecreatefromgif' => 'Safe\imagecreatefromgif',
             'imagecreatefromjpeg' => 'Safe\imagecreatefromjpeg',
             'imagecreatefrompng' => 'Safe\imagecreatefrompng',
+            'imagecreatefromstring' => 'Safe\imagecreatefromstring',
             'imagecreatefromtga' => 'Safe\imagecreatefromtga',
             'imagecreatefromwbmp' => 'Safe\imagecreatefromwbmp',
             'imagecreatefromwebp' => 'Safe\imagecreatefromwebp',