Php/docs/internals2.opcodes.raise-abstract-error

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• Opcode Descriptions and Examples
• RAISE_ABSTRACT_ERROR

RAISE_ABSTRACT_ERROR

PHP code

<?php/* *  * opcode number: 142 */abstract class fail {    abstract function show();}class pass extends fail {    function show() {        echo "Call to function show()\n";    }}$t2 = new pass();$t2->show();$t = new fail();$t->show();echo "Done\n"; // shouldn't be displayed?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$t2, !1=$t

line	#	op	fetch	ext	return	operands
7	0	NOP
11	1	NOP
	2	NOP
17	3	ZEND_FETCH_CLASS			:3	'pass'
	4	NEW			$4	:3
	5	DO_FCALL_BY_NAME		0
	6	ASSIGN				!0,$4
18	7	ZEND_INIT_METHOD_CALL				!0,'show'
	8	DO_FCALL_BY_NAME		0
20	9	ZEND_FETCH_CLASS			:9	'fail'
	10	NEW			$10	:9
	11	DO_FCALL_BY_NAME		0
	12	ASSIGN				!1,$10
21	13	ZEND_INIT_METHOD_CALL				!1,'show'
	14	DO_FCALL_BY_NAME		0
23	15	ECHO				'Done%0A'
24	16	RETURN				1

Function name: show

Compiled variables: none

line	#	op	fetch	ext	return	operands
8	0	ZEND_RAISE_ABSTRACT_ERROR
	1	RETURN				null

Function name: show

Compiled variables: none

line	#	op	fetch	ext	return	operands
13	0	ECHO				'Call+to+function+show%28%29%0A'
14	1	RETURN				null