Warning: Undefined array key "id" in C:\xampp\htdocs\mea-project-back\php\mail2.php on line 12

Warning: Undefined array key "pdf" in C:\xampp\htdocs\mea-project-back\php\mail2.php on line 26

Warning: Trying to access array offset on value of type null in C:\xampp\htdocs\mea-project-back\php\mail2.php on line 26

Fatal error: Uncaught InvalidArgumentException: Invalid type in $file parameter (NULL) in C:\xampp\htdocs\mea-project-back\vendor\setasign\fpdi\src\FpdiTrait.php:161 Stack trace: #0 C:\xampp\htdocs\mea-project-back\vendor\setasign\fpdi\src\FpdiTrait.php(213): setasign\Fpdi\Fpdi->getPdfReaderId(NULL) #1 C:\xampp\htdocs\mea-project-back\php\mail2.php(29): setasign\Fpdi\Fpdi->setSourceFile(NULL) #2 {main} thrown in C:\xampp\htdocs\mea-project-back\vendor\setasign\fpdi\src\FpdiTrait.php on line 161