Finding the sum of specific multidimensional array php - php

Question

<?php
$bookrec=array(
'book1'=>array('callno'=>123005,'price'=>number_format(1380,2),'desc'=>'Attack on Titan Anthology'),
'book2'=>array('callno'=>123006,'price'=>number_format(844,2),'desc'=>'Binge'),
'book3'=>array('callno'=>123004,'price'=>number_format(598,2),'desc'=>'A Work in Progress'),
'book4'=>array('callno'=>123003,'price'=>number_format(668,2),'desc'=>'The Amazing Book is Not on Fire: The World of Dan and Phil'),
'book5'=>array('callno'=>123002,'price'=>number_format(760,2),'desc'=>'Children of Eden: A Novel')
);
$sumbook=array();
echo "<table>";
echo "<tr><b>
<td>Call Number</td><td>Price</td><td>Book Title</td>
</b></tr>";
while(list($booknum,$rec)=each($bookrec)){
echo "<tr>";
foreach($rec as $data){
echo "<td>". $data."<br></td>";
foreach($data as $k => $val){
if(array_key_exists($val,$sumbook))
$sumbook[$val]['price']=$sumbook[$val]['price']+$data['price'];
else if($k == 'desc' && $k == 'callno')
$sumbook[$val] = $data;
}
}
}
echo "<br></tr>";
echo "</table>";
echo "TOTAL AMOUNT: Php ".$sumbook;?>
I am finishing this code for next week. Also, I am a student and just beginning in PHP. My problem is that I am trying to output the sum of ['price'] in the given array but it gives me this error:
Invalid argument supplied for foreach
I also tried various ways on solving this problem but I don't really get it. Please help. :) Thanks!!

Answer 1

<?php
$bookrec=array(
'book1'=>array('callno'=>123005,'price'=>number_format(1380,2),'desc'=>'Attack on Titan Anthology'),
'book2'=>array('callno'=>123006,'price'=>number_format(844,2),'desc'=>'Binge'),
'book3'=>array('callno'=>123004,'price'=>number_format(598,2),'desc'=>'A Work in Progress'),
'book4'=>array('callno'=>123003,'price'=>number_format(668,2),'desc'=>'The Amazing Book is Not on Fire: The World of Dan and Phil'),
'book5'=>array('callno'=>123002,'price'=>number_format(760,2),'desc'=>'Children of Eden: A Novel')
);
$sumbook=array();
echo "<table>";
echo "<tr><b>
<td>Call Number</td><td>Price</td><td>Book Title</td>
</b></tr>";
foreach($bookrec as $key1=>$rec )
{
echo "<tr>";
foreach($rec as $key2=>$data)
{
echo "<td>". $data."<br></td>";
if($key2="price")
{
$total+=$data;
}
}
echo "</tr><br>";
}
echo "<br></tr>";
echo "</table>";
echo "TOTAL AMOUNT: Php ".$sumbook;?>

Answer 2

I think you have lots of looping error just follow this code and also understand the how to iterate the array using foreach
$sumbook=array();
$total =0;
echo "<table>";
echo "<tr><b>
<td>Call Number</td><td>Price</td><td>Book Title</td>
</b></tr>";
foreach($bookrec as $key1=>$rec )
{
echo "<tr>";
foreach($rec as $key2=>$data)
{
echo "<td>". $data."<br></td>";
if($key2="price")
{
$total+=$data;
}
}
echo "</tr><br>";
}
echo "</table>";
echo "TOTAL AMOUNT: Php ".$total;
?>

Answer 3

Your first foreach loop had a wrong variable name with the one you initialized as your array.
foreach($bookrec as $data){
}