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Opcode Descriptions and Examples
PHP Manual

## CONCAT

## PHP code

`<?php
/*
* Concats string values string1 and string2
* opcode number: 8
*/
echo "hello" . "world";
?>`

## PHP opcodes

Function name: (null)

Compiled variables: none

line | # | op | fetch | ext | return | operands
--- | --- | --- | --- | --- | --- | ---
6 | 0 | CONCAT |  |  | ~0 | 'hello','world'
| 1 | ECHO |  |  |  | ~0
7 | 2 | RETURN |  |  |  | 1

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Opcode Descriptions and Examples
PHP Manual