取任意2个数，生成这两个数之间的随机数，包括小数。
$u[0]=74.3;//设置起始数值 $u[1]=74.45;//设置终止数值
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<title>随机数</title>
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<div class="con" align="left">
<a href="rand.php">刷新</a>
<div class="line"></div>
<?php
function _getFloatLength($num) {
$count = 0;
$temp = explode ('.', $num);
if (sizeof ($temp) > 1) {
$decimal = end ($temp);
$count = strlen ($decimal);
}
return $count;
}
// 调试函数
function pr($a) {
echo '<pre>';
print_r($a);
echo '</pre>';
}
function rand_ ($l,$u,$ll){
$bs=pow(10,$ll);
//echo $bs.'<br>'.$l*$bs.'<br>'.$u*$bs.'<br><br><br>';
for ($i=1;$i<=200;$i++){
if($i>5 && ($i%5) ==1){echo "<br>";}
else {
if ($i>1) {echo ",";}
}
echo rand($l*$bs,$u*$bs)/$bs;
}
}
$u=Array();
$u[0]=74.3;
$u[1]=74.45;
$u[2]=_getFloatLength($u[0]);
$u[3]=_getFloatLength($u[1]);
$u[4]=max($u[2],$u[3]);
//pr($u);
rand_($u[0],$u[1],$u[4]);
?>
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