eth #6123: Requirement Checker proc_open (#6154)

* eth #6123: Requirement Checker proc_open

* Update SelfTest.php

* Update CHANGELOG-DEV.md

* Update CHANGELOG-DEV.md

---------

Co-authored-by: Lucas Bartholemy <luke-@users.noreply.github.com>

CHANGELOG-DEV.md

@@ -29,3 +29,4 @@ HumHub Changelog (DEVELOP)
 - Enh #5625: Update jQuery UI to version 1.13
 - Enh #6144: Added ability to change/disable `Forgot your password?` link
 - Fix #4988: Unable to archive space on Form Validation errors
+- Enh #6123: Added check for `proc_open` function in Requirement Checker 

protected/humhub/libs/SelfTest.php

@@ -407,6 +407,21 @@ class SelfTest
             ];
         }
 
+        // Checks `proc_open` is on in Disabled Functions
+        $title = 'PHP - ' . Yii::t('AdminModule.information', 'Disabled Functions');
+        if (function_exists('proc_open')) {
+            $checks[] = [
+                'title' => $title,
+                'state' => 'OK'
+            ];
+        } else {
+            $checks[] = [
+                'title' => $title,
+                'state' => 'WARNING',
+                'hint' => Yii::t('AdminModule.information', 'Make sure that the `proc_open` function is not disabled.')
+            ];
+        }
+
         // Checks Database Data
         $checks = self::getDatabaseResults($checks);