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PHP - Manual: FETCH_DIM_R - 互联网笔记

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PHP官方手册 - 互联网笔记

PHP - Manual: FETCH_DIM_R

2025-06-09

FETCH_DIM_R

PHP code

<?php
/*
 * Fetch the value of the element at "index" in "array-value" to store it in "result".  Read-only?
 * opcode number: 81
 */
$x = array(1,2,3);
$a 'x';
echo $
$a[0];
?>

PHP opcodes

Function name: (null)

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

line#op fetchextreturn operands
60 INIT_ARRAY   ~0 1
 1 ADD_ARRAY_ELEMENT   ~0 2
 2 ADD_ARRAY_ELEMENT   ~0 3
 3 ASSIGN     !0,~0
74 ASSIGN     !1,'x'
85 FETCH_DIM_R   $3 !1,0
 6 FETCH_Rlocal  $4 $3
 7 ECHO     $4
98 RETURN     1
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官方地址:https://www.php.net/manual/en/internals2.opcodes.fetch-dim-r.php

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