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@jfcherng

jfcherng/trap_1.php

Last active October 12, 2017 07:27
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PHP Reference Trap
Raw
trap_1.php
<?php
$foo = [];
$foo['love'] = 1;
$bar = &$foo['love']; // no harm, huh?
$tipi = $foo;
$tipi['love'] = 2;
echo $foo['love']; // 2
Raw
trap_2.php
<?php
$foo = [];
$foo['love'] = 1;
$bar = &$foo['love'];
unset($bar); // only add this line
$tipi = $foo;
$tipi['love'] = 2;
echo $foo['love']; // 1
@jfcherng
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http://www.php-internals.com/book/?p=chapt06/06-06-copy-on-write

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