PHP Opcode Descriptions and Examples UNSET_VAR_编程学问网

UNSET_VAR

PHP code

 <?php
/*
 * Unset the variable and store the original value into "result".
 * opcode number: 74
 */
$x = 1;
$a='x';
unset($$a);
?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$x, !1=$a

line	#	op	fetch	ext	return	operands
6	0	ASSIGN				!0,1
7	1	ASSIGN				!1,'x'
8	2	UNSET_VAR			$2	!1
9	3	RETURN				1

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