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<?php var_dump(unserialize('O:43:"\Symfony\Component\HttpFoundation\File\File":0:{}'));
Output for 5.0.0 - 5.0.3, 5.3.0 - 7.1.0
object(__PHP_Incomplete_Class)#1 (1) { ["__PHP_Incomplete_Class_Name"]=> string(43) "\Symfony\Component\HttpFoundation\File\File" }
Output for 4.3.11 - 4.4.9, 5.0.4 - 5.2.17
Notice: unserialize(): Error at offset 6 of 55 bytes in /in/EAkI1 on line 14 bool(false)
Output for 4.3.0 - 4.3.10
object(__PHP_Incomplete_Class)(1) { ["__PHP_Incomplete_Class_Name"]=> string(43) "\symfony\component\httpfoundation\file\file" }