Question

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how to extract data from csv file in php

i’m new on php and now i try to make a private site for me and read out some stock information over yahoo api

Link: finance.yahoo.com/d/quotes.csv?s=^GDAXI+^TECDAX+eurusd=x+gcf12.cmx+CLH12.NYM&f=nl1k2

The link works fine but now how can i read this file out? And echo the information on my page?

Output:

"DAX",6864.43,"+54.97 - +0.81%"
"TECDAX",775.33,"+3.78 - +0.49%"
"EUR to USD",1.3447,"N/A - 0.00%"
"Gold Jan 12",1731.80,"N/A - +0.32%"
"Crude Oil Mar 12",105.88,"N/A - +0.04%"

What i need:

echo $name;
echo $rate;
echo $change;
echo $changeinpercent;

I hope some one can help me, and sry for my bad english.

Greetings,
matthias

Answer 1

You could use RegEx to extract from each line the information you need. The following php code is what you need to extract this specific data. It’s a RegEx code and you should use it with a preg_match function:

/\"([^\"]+)\",(\d+\.\d+),\"(N\/A)?([+-]?\d+\.?\d+)?\s+-\s+([+-]?\d+\.?\d+%?)/  

It gives you an array, and you will use it as:

$match[0]  
$match[1]  
$match[2]  
$match[3]  

UPDATE:
This is the code to do it:

<?php
$csv=file_get_contents("http://finance.yahoo.com/d/quotes.csv?s=^GDAXI+^TECDAX+eurusd=x+gcf12.cmx+CLH12.NYM&f=nl1k2");

$rows=explode("\n", $csv);

for($i=0;$i<count($rows);$i++)
{
    preg_match_all("/\"([^\"]+)\",(\d+\.\d+),\"(N\/A)?([+-]?\d+\.?\d+)?\s+-\s+([+-]?\d+\.?\d+%?)/", $rows[$i],$matches,PREG_SET_ORDER);
}
?>  

It returns:

Array
(
   [0] => Array
        (
            [0] => "DAX",6864.43,"+54.97 - +0.81%
            [1] => DAX
            [2] => 6864.43
            [3] => 
            [4] => +54.97
            [5] => +0.81%
        )  
Array
(
    [0] => Array
        (
            [0] => "Gold Jan 12",1731.80,"N/A - +0.32%
            [1] => Gold Jan 12
            [2] => 1731.80
            [3] => N/A
            [4] => 
            [5] => +0.32%
        )

)

If it is N/A you will find it in $matches[3], if a value in 4.
)