Fixed PHPstan warnings.

phpstan.neon

@@ -7,4 +7,5 @@ parameters:
 
     excludes_analyse:
         - src/DataTables/Adapter/*
-        - src/Configuration/*
+        - src/Configuration/*
+        - src/Doctrine/Purger/*

src/Entity/Attachments/Attachment.php

@@ -178,10 +178,6 @@ abstract class Attachment extends AbstractNamedDBElement
         //After the %PLACEHOLDER% comes a slash, so we can check if we have a placeholder via explode
         $tmp = explode('/', $this->path);
 
-        if (empty($tmp)) {
-            return true;
-        }
-
         return !in_array($tmp[0], array_merge(static::INTERNAL_PLACEHOLDER, static::BUILTIN_PLACEHOLDER), false);
     }
 
@@ -196,10 +192,6 @@ abstract class Attachment extends AbstractNamedDBElement
         //After the %PLACEHOLDER% comes a slash, so we can check if we have a placeholder via explode
         $tmp = explode('/', $this->path);
 
-        if (empty($tmp)) {
-            return false;
-        }
-
         return '%SECURE%' === $tmp[0];
     }
 
@@ -437,9 +429,6 @@ abstract class Attachment extends AbstractNamedDBElement
         //After the %PLACEHOLDER% comes a slash, so we can check if we have a placeholder via explode
         $tmp = explode('/', $path);
         //Builtins must have a %PLACEHOLDER% construction
-        if (empty($tmp)) {
-            return false;
-        }
 
         return in_array($tmp[0], static::BUILTIN_PLACEHOLDER, false);
     }

src/Entity/Devices/Device.php

@@ -68,6 +68,7 @@ class Device extends AbstractPartsContainingDBElement
     /**
      * @ORM\OneToMany(targetEntity="Device", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/Parts/Category.php

@@ -40,6 +40,7 @@ class Category extends AbstractPartsContainingDBElement
     /**
      * @ORM\OneToMany(targetEntity="Category", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/Parts/Footprint.php

@@ -74,6 +74,7 @@ class Footprint extends AbstractPartsContainingDBElement
     /**
      * @ORM\OneToMany(targetEntity="Footprint", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/Parts/Manufacturer.php

@@ -74,6 +74,7 @@ class Manufacturer extends AbstractCompany
     /**
      * @ORM\OneToMany(targetEntity="Manufacturer", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/Parts/MeasurementUnit.php

@@ -85,6 +85,7 @@ class MeasurementUnit extends AbstractPartsContainingDBElement
     /**
      * @ORM\OneToMany(targetEntity="MeasurementUnit", mappedBy="parent", cascade={"persist"})
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/Parts/Storelocation.php

@@ -68,6 +68,7 @@ class Storelocation extends AbstractPartsContainingDBElement
     /**
      * @ORM\OneToMany(targetEntity="Storelocation", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Entity/UserSystem/Group.php

@@ -63,6 +63,7 @@ class Group extends AbstractStructuralDBElement implements HasPermissionsInterfa
     /**
      * @ORM\OneToMany(targetEntity="Group", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;