Hello…I’m totally new to PHP and making lots of mistakes but I’m trying my best…I got this code to run in my generator but it won’t produce any numbers at all…just a blank page…am I missing something in my code??? I even tried several different ways as you can tell but still no numbers output…Any help Please…
[php]<?php
//include ("gause.php");
// this lets the processor know that this data type relies on data defined in other fields. That
// information is either hardcoded in the functions below, or passed via an option
$NormalDistribution_process_order = 1;
function NormalDistribution_get_template_options($postdata, $col, $num_col){
if (!isset($postdata["NormalDistributionMu_$col"]) || empty($postdata["NormalDistributionMu_$col"]) ||
!isset($postdata["NormalDistributionSigma_$col"]) || empty($postdata["NormalDistributionSigma_$col"])) {
return false;
}
$gauss = gauss();
$this->randMax = (float) getrandmax();
return array(
"mu" => $postdata["NormalDistributionMu_$col"],
"sigma" => $postdata["NormalDistributionSigma_$col"]
);
}
function NormalDistribution_generate_item($row, $options, $existing_row_data)
{
function gauss()
{ // N(0,1)
// returns random number with normal distribution:
// mean=0
// std dev=1
// auxilary vars
$x=random_0_1();
$y=random_0_1();
// two independent variables with normal distribution N(0,1)
$u=sqrt(-2log($x))cos(2pi()$y);
$v=sqrt(-2log($x))sin(2pi()$y);
// i will return only one, couse only one needed
return $u;
}
function gauss_ms($mu=0.0,$sigma=1.0)
{ //N(m,s)
// returns random number with normal distribution:
//mean=m
//std dev=s
//return gauss()*$sigma+$mu;
return $this->gauss() * $sigma + $mu;
}
function random_0_1()
{ // auxiliary function
// returns random number with flat distribution from 0 to 1
return (float)rand()/(float)getrandmax();
//return rand($options[“min”], $options[“max”]);
}
function NormalDistribution_get_export_type_info($export_type, $options)
{
$info = "";
switch ($export_type)
{
case "sql":
if ($options == "MySQL" || $options == "SQLite")
$info = "mediumint default NULL";
else if ($options == "Oracle")
$info = "varchar2(50) default NULL";
break;
}
return $info;
}
}[/php]