Opcode Descriptions and Examples
PHP Manual

EXIT

PHP code

<?php
/*
 * Exit running after dumping "message".
 * opcode number: 79
 */
die("foobar");
?>

PHP opcodes

Function name: (null)

Compiled variables: none

line#op fetchextreturn operands
60 EXIT     'foobar'
71 RETURN     1

Opcode Descriptions and Examples
PHP Manual