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¶ÁÈ¡ÈÎÒⳤ¶È: fread()
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ÎļþËø¶¨: flock()
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Êý×éÅÅÐò: sort(), asort(), ksort()
Êý×é·´ÏòÅÅÐò: rsort(), arsort(), krsort()
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Êý×éËæ»úÅÅÐò: shuffle()
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ת³É´óд×Ö·û: strtoupper()
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require('upload.php');
if($_POST['submit']){
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<?php
class math{

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