Internals2/opcodes/is-identical-Phpdoc专题
IS_IDENTICAL
PHP code
<?php
/*
* Compares value1 and value2 to see if they are equal AND have the same type
* opcode number: 15
*/
echo (1===1);
echo (1==='a');
?>PHP opcodes
Function name: (null)
Compiled variables: none
| line | # | op | fetch | ext | return | operands |
|---|---|---|---|---|---|---|
| 6 | 0 | IS_IDENTICAL | ~0 | 1,1 | ||
| 1 | ECHO | ~0 | ||||
| 7 | 2 | IS_IDENTICAL | ~1 | 1,'a' | ||
| 3 | ECHO | ~1 | ||||
| 8 | 4 | RETURN | 1 |