PHP 5.6 и PHP 7 на русском: SWITCH

SWITCH_FREE


<?php
/*
 * Release the allocated space of "value"?
 * opcode number: 49
 */
$a = array(1,2,3);
foreach($a as $num){
    print $num;
}
?>

Function name: (null)

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

line	#	op	return	operands
6	0	INIT_ARRAY	~0	1
	1	ADD_ARRAY_ELEMENT	~0	2
	2	ADD_ARRAY_ELEMENT	~0	3
	3	ASSIGN		!0,~0
7	4	FE_RESET	$2	!0,->11
	5	FE_FETCH	$3	$2,->11
	6	ZEND_OP_DATA
	7	ASSIGN		!1,$3
8	8	PRINT	~5	!1
	9	FREE		~5
9	10	JMP		->5
	11	SWITCH_FREE		$2
10	12	RETURN		1

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