(PECL apc >= 3.1.1)
apc_cas — 锟斤拷锟斤拷值锟斤拷锟铰撅拷值
$key
, int $old
, int $new
) : bool
apc_cas() 锟斤拷锟絢ey锟斤拷锟节ｏ拷锟斤拷锟斤拷key锟斤拷前锟芥储锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
old锟斤拷锟斤拷使锟斤拷
new 锟斤拷锟斤拷key锟斤拷前锟芥储锟斤拷锟斤拷锟斤拷锟斤拷
key锟斤拷要锟斤拷锟斤拷锟铰碉拷 key锟斤拷
oldkey锟斤拷前值锟斤拷
new指锟斤拷锟侥革拷锟斤拷值锟斤拷
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷
Example #1 apc_cas() 示锟斤拷
<?php
apc_store('foobar', 2);
echo '$foobar = 2', PHP_EOL;
echo '$foobar == 1 ? 2 : 1 = ', (apc_cas('foobar', 1, 2) ? 'ok' : 'fail'), PHP_EOL;
echo '$foobar == 2 ? 1 : 2 = ', (apc_cas('foobar', 2, 1) ? 'ok' : 'fail'), PHP_EOL;
echo '$foobar = ', apc_fetch('foobar'), PHP_EOL;
echo '$f__bar == 1 ? 2 : 1 = ', (apc_cas('f__bar', 1, 2) ? 'ok' : 'fail'), PHP_EOL;
apc_store('perfection', 'xyz');
echo '$perfection == 2 ? 1 : 2 = ', (apc_cas('perfection', 2, 1) ? 'ok' : 'epic fail'), PHP_EOL;
echo '$foobar = ', apc_fetch('foobar'), PHP_EOL;
?>
锟斤拷锟斤拷锟斤拷锟教碉拷锟斤拷锟斤拷锟斤拷锟斤拷冢锟�
$foobar = 2 $foobar == 1 ? 2 : 1 = fail $foobar == 2 ? 1 : 2 = ok $foobar = 1 $f__bar == 1 ? 2 : 1 = fail $perfection == 2 ? 1 : 2 = epic fail $foobar = 1