如何用php生成1-10之间的不重复随机数?
例1,使用shuffle函数生成随机数。
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<?php
$arr =range(1,10);
shuffle( $arr );
foreach ( $arr as $values )
{
echo $values . " " ;
}
?>
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例2,使用array_unique函数生成随机数。
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<?php
$arr = array ();
while ( count ( $arr )<10)
{
$arr []=rand(1,10);
$arr = array_unique ( $arr );
}
echo implode( " " , $arr );
?>
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例3,使用array_flip函数生成随机数,可以去掉重复值。
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<?php
$arr = array ();
$count1 =0;
$count = 0;
$return = array ();
while ( $count < 10)
{
$return [] = mt_rand(1, 10);
$return = array_flip ( array_flip ( $return ));
$count = count ( $return );
} //www.zzvips.com
foreach ( $return as $value )
{
echo $value . " " ;
}
echo "<br/>" ;
$arr = array_values ( $return ); // 获得数组的值
foreach ( $arr as $key )
echo $key . " " ;
?>
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php随机数生成函数示例
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<?php
function randpw( $len =8, $format = 'ALL' ){
$is_abc = $is_numer = 0;
$password = $tmp = '' ;
switch ( $format ){
case 'ALL' :
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789' ;
break ;
case 'CHAR' :
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' ;
break ;
case 'NUMBER' :
$chars = '0123456789' ;
break ;
default :
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789' ;
break ;
} // www.zzvips.com
mt_srand((double)microtime()*1000000* getmypid ());
while ( strlen ( $password )< $len ){
$tmp = substr ( $chars ,(mt_rand()% strlen ( $chars )),1);
if (( $is_numer <> 1 && is_numeric ( $tmp ) && $tmp > 0 )|| $format == 'CHAR' ){
$is_numer = 1;
}
if (( $is_abc <> 1 && preg_match( '/[a-zA-Z]/' , $tmp )) || $format == 'NUMBER' ){
$is_abc = 1;
}
$password .= $tmp ;
}
if ( $is_numer <> 1 || $is_abc <> 1 || empty ( $password ) ){
$password = randpw( $len , $format );
}
return $password ;
}
for ( $i = 0 ; $i < 10; $i ++){
echo randpw(8, 'NUMBER' );
echo "<br>" ;
}
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