9-27-函数

<?php
/*
str_repeat--->重复字符串
string str_repeat(string $input,int $multiplier)
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multiplier:乘数
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echo strpeat(12,3);

str_shuffle:随机打乱一个字符串
string str_shuffle(string $str);
str_shuffle()函数打乱一个字符串,使用任何一种排序方案.
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hash:
hash->Generate a hash Value(message digest);
string hash(string $algo,string $data [,bool $raw_output])

algo:Name of selected hashing algorithm (i.e,"md5","sha256","haval160",etc....)
data:
Message to be hashed
raw_output:
When set to TRUE,outputs raw binary data.Default value(FALSE) outputs lowercase hexits.
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