PHP Opcode Descriptions and Examples ADD_STRING_编程学问网

ADD_STRING

PHP code

 <?php
/*
 * add string value2 to string value2 and store in result
 * opcode number: 55
 */
echo "hello$a world";
?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$a

line	#	op	fetch	ext	return	operands
6	0	ADD_STRING			~0	'hello'
	1	ADD_VAR			~0	~0,!0
	2	ADD_STRING			~0	~0,'+world'
	3	ECHO				~0
7	4	RETURN				1

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