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¶ÁÈ¡ÈÎÒⳤ¶È: fread()
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È·¶¨Îļþ´óС: filesize()
ɾ³ýÒ»¸öÎļþ: unlink()
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Êý×é·´ÏòÅÅÐò: rsort(), arsort(), krsort()
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Êý×éËæ»úÅÅÐò: shuffle()
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