Internals2/opcodes/concat-Phpdoc专题
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 |