php maths

[Mike4x4s]

is there an example at all where i can do a sum in php 1 +3 = answer?

[guido2004]

$result = $number1 + $number2;

[awright418]

Uh oh... Remember this thread?

http://www.sitepoint.com/forums/showthread.php?t=580793

How about....

if(1 + 3 == 4){
    echo "answer";
} 

[guido2004]

Uh oh... Remember this thread?

http://www.sitepoint.com/forums/showthread.php?t=580793

yeah

[-T-]

Uh oh... Remember this thread?

http://www.sitepoint.com/forums/showthread.php?t=580793

How about....

if(1 + 3 == 4){
    echo "answer";
} 

Heh, I'm up for some fun

function sum($arg1, $arg2)
{
  $x = 0;
  for ( $i = 0; $i < $arg1; $i++)
  {
    $x++;
  }
 
  for ( $i = 0; $i < $arg2; $i++ )
  {
    $x++;
  }
  return $x;
}

echo sum(4,6); 

[-T-]

Or make it handle a variable amount of numbers

function sum()
{
  $args = function_get_args();
  $sum = 0;

  foreach($args AS $arg)
  {
    if( is_numeric($arg) 
    {
      for($i = 0; $i < $arg; $i++ )
      {
        $sum++;
      }
    }
  }
  
  return $sum;
}

echo sum(4,6,6,7,4,3); 

[Jake Arkinstall]

Ooh, let the contraptions begin:

<?php
class Count{
    protected $Raw = array();
    function AddNumber($Number){
        for($i = 0; $i < $Number; $i++){
            $this->Raw[] = 1;
        }
    }
    function GetRaw($Recursion = 0){
        $Count = -1;
        foreach(range(0, Count($this->Raw)) as $Number){
            $Count -= $Number - 1;
            $Count += $Number;
        }
        if($Recursion == 1000) return $Count;
        return $this->GetRaw($Recursion + 1);
    }
    function GetSum(){
        return $this->GetRaw();
        $Count = 0;
        foreach(range(0, Count($this->GetRaw())) as $Number){
            $Count = $Number;
        }
        return $Count;
    }
}
$Count = new Count();
$Count->AddNumber(4);
$Count->AddNumber(40);
$Count->AddNumber(400);
$Count->AddNumber(4000);
echo $Count->GetSum();

Off Topic:

@OP, don't take that code seriously

[-T-]

This one uses ASCII to iterate

Can handle numbers up to 1000 characters long, though, it is a bit of a memory hog

<?php

class Sum
{
    private $asciiArray;
    
    public function Sum()
    {
        for( $i = 0; $i < 1000; $i++)
        {
            $this->asciiArray[$i] = 48;
        }
        
    }
    
    public function addNumber($number)
    {
        if ( is_numeric($number) == false) return false;
        
        if( strlen($number) == 1)
        {
            for($i = 0; $i < $number; $i++)
            {
                $this->recursiveIterator(0);
            }
        }
        else
        {
            $splitNumber = str_split($number);
            
            $revSplitNumber = array_reverse($splitNumber);
            
            for($i = 0; $i < count($revSplitNumber); $i++)
            {
                if($revSplitNumber[$i] > 0)
                {
                    for($x = 0; $x < $revSplitNumber[$i]; $x++)
                    {
                        $this->recursiveIterator($i);
                    }
                }
            }
        }
        
        
        
    }
    
    public function printSum()
    {
        $print = array_reverse($this->asciiArray);
        
        $hitNumber = false;
        
        foreach( $print AS $ascii )
        {
            $number = chr($ascii);
            if($hitNumber == false && $number > 0)
            {
                $hitNumber = true;
            }
            if($hitNumber == true)
            {
                echo $number;
            }
            
        }
    }
    
    private function recursiveIterator($x)
    {
        
        $this->asciiArray[$x]++;
        
        if($this->asciiArray[$x] > 57)
        {
            $this->asciiArray[$x] = 48;
            $this->recursciveIterator($x + 1);
        }
    }
}

$Sum = new Sum();
$Sum->addNumber(1);
$Sum->addNumber(2);
$Sum->addNumber(3);
$Sum->addNumber(100000);
$Sum->printSum();

[crmalibu]

Do you mean let the user submit a string that contains "1 + 3" and you provide the answer? Like

<input name="equation" value="1 + 3">

Like how google does it when you type 1 + 3 into thier search engine? (try it)

[Young Twig]

php -r "$size=2;$px=array('1'=>array(0,0,1,0,0,0,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,1,1,1,0),'2'=>array(0,0,1,0,0,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,1,1,0),'3'=>array(0,1,1,1,0,0,0,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,1,0),'4'=>array(0,1,0,1,0,0,1,0,1,0,0,1,1,1,0,0,0,0,1,0,0,0,0,1,0),'5'=>array(0,1,1,1,0,0,1,0,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0),'6'=>array(0,0,1,1,0,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,1,0,0),'7'=>array(0,1,1,1,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0),'8'=>array(0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0),'9'=>array(0,0,1,0,0,0,1,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,0,0),'0'=>array(0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0),'-'=>array(0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0),'.'=>array(0,0,0,0,0,0,0,0,0,0,0,0,0,1,0));$sum=strval(floatval($argv[1])+floatval($argv[2]));for($r=0,$rr=0;$r<5*$size;$r++,$rr=floor($r/$size)){for($d=0;$d<strlen($sum);$d++){$a=$px[$sum[$d]];for($x=count($a)/5,$i=$rr*$x;$i<$x+$rr*$x;$i++){echo str_repeat(($a[$i]===1)?'#':' ',$size);}}echo \"\n\";}" x y

Replace x and y with the numbers you wish to add. You can also change the size by editing $size in the source code.

Example:

> php -r "$size=2;$px=array('1'=>array(0,0,1,0,0,0,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,1,1,1,0),'2'=>array(0,0,1,0,0,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,1,1,0),'3'=>array(0,1,1,1,0,0,0,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,1,0),'4'=>array(0,1,0,1,0,0,1,0,1,0,0,1,1,1,0,0,0,0,1,0,0,0,0,1,0),'5'=>array(0,1,1,1,0,0,1,0,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0),'6'=>array(0,0,1,1,0,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,1,0,0),'7'=>array(0,1,1,1,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0),'8'=>array(0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0),'9'=>array(0,0,1,0,0,0,1,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,0,0),'0'=>array(0,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,1,0,1,0,0,0,1,0,0),'-'=>array(0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0),'.'=>array(0,0,0,0,0,0,0,0,0,0,0,0,0,1,0));$sum=strval(floatval($argv[1])+floatval($argv[2]));for($r=0,$rr=0;$r<5*$size;$r++,$rr=floor($r/$size)){for($d=0;$d<strlen($sum);$d++){$a=$px[$sum[$d]];for($x=count($a)/5,$i=$rr*$x;$i<$x+$rr*$x;$i++){echo str_repeat(($a[$i]===1)?'#':' ',$size);}}echo \"\n\";}" 95 21.1
    ##        ##        ####            ##
    ##        ##        ####            ##
  ####      ####      ##              ####
  ####      ####      ##              ####
    ##        ##      ####              ##
    ##        ##      ####              ##
    ##        ##      ##  ##            ##
    ##        ##      ##  ##            ##
  ######    ######      ##      ##    ######
  ######    ######      ##      ##    ######

[Mark Baker]

Or using multiplication to calculate the result of an addition:

$number1 = 23;

$number2 = 19;

$answer = log(exp($number1) * exp($number2));

echo $number1.' + '.$number2.' = '.$answer; 

[crmalibu]

I wanna see the genetic mutation method again lol

[prafuitu]

is there an example at all where i can do a sum in php 1 +3 = answer?

echo 4; 

[prafuitu]

...or maybe some shell help:

exec('echo $((3 + 1))', $result);
echo array_pop($result); 

with the much simpler and easy to read, single line alternative using the backtick operator:

echo trim(array_pop( explode("\n", trim(`echo $((3 + 1))`) ) ) ); 

[adstiger]

echo $x + $y