ramesh4046
asked on
PHP - Open 2 CSV files and update the second CSV file
I have 2 huge CSV files. The first CSV file will look something like below.
The second CSV file will look something like below.
The format of the second CSV file would be set of values (like 1,2 separated by spaces) and then a tab delimiter followed by values separated by spaces.
In the second CSV file all I need to do is, replace the values like 1,2,3 etc with the corresponding column values of the first CSV file. So, after replacing the values, the second CSV file should look like, For example, the first row in the second CSV file has 1 and 2 which corresponds to Jack and John in the first CSV file. So the final output that am expecting is something like this.
I was trying to use PHP and trying to do something like this.
I am not able to figure out a way on how to do this problem. Can someone please guide me in the right direction?
jack 1 2 3 4
john 5 6 7 8
mark 8 7 9 10
mike 1 3 4 7
helen 3 4 5 6The second CSV file will look something like below.
1 2 \t 12 23 45
3 5 \t 13 45 57
1 4 \t 12 98 88The format of the second CSV file would be set of values (like 1,2 separated by spaces) and then a tab delimiter followed by values separated by spaces.
In the second CSV file all I need to do is, replace the values like 1,2,3 etc with the corresponding column values of the first CSV file. So, after replacing the values, the second CSV file should look like, For example, the first row in the second CSV file has 1 and 2 which corresponds to Jack and John in the first CSV file. So the final output that am expecting is something like this.
jack john 12 23 45
mark helen 13 45 57
jack mike 12 98 88I was trying to use PHP and trying to do something like this.
$file = fopen("secondfile.csv","r");
//I am reading till tab space to get the values that needs replacement.
while ($line = fgetcsv($file, 0, "\t") !== false)
{
//I should read till tab spce and replace it with the values from firstfile.csv
}
fclose($file);
?>I am not able to figure out a way on how to do this problem. Can someone please guide me in the right direction?
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Ray Paseur
CSV files contain data fields that are usually separated by commas, but there is a conspicuous lack of commas in the data samples. Any chance we could see a link to the actual data or a subset of the actual data, so we can read the files from a data source?
I have to leave this question now. This code tests out given the information in the OP.
http://www.laprbass.com/RAY_temp_ramesh4046.php
http://www.laprbass.com/RAY_temp_ramesh4046.php
<?php // RAY_temp_ramesh4046.php
error_reporting(E_ALL);
echo '<pre>';
// SEE http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_28280262.html
// SIMULATE READING THESE FILES WITH file_get_contents()
$file1 = <<<EOD
jack 1 2 3 4
john 5 6 7 8
mark 8 7 9 10
mike 1 3 4 7
helen 3 4 5 6
EOD;
$file2 = <<<EOD
1 2 \t 12 23 45
3 5 \t 13 45 57
1 4 \t 12 98 88
EOD;
// TURN FILE 1 INTO A USEFUL DATA STRUCTURE
$data1 = array();
$data1[0] = NULL;
$arr = explode(PHP_EOL, $file1);
foreach ($arr as $str)
{
// ARRAY NUMERIC INDEX WILL MATCH NUMBERS EXPECTED IN FILE 2
$data1[] = current(explode(' ', $str));
}
// PROCESS FILE 2
$data3 = array();
$arr = explode(PHP_EOL, $file2);
foreach ($arr as $str)
{
$out = NULL;
// SPLIT ON TAB AND SAVE THE RIGHTMOST DATA STRING
$sub = explode("\t", $str);
$ends = trim(end($sub));
// SPLIT ON BLANK
$nums = trim($sub[0]);
$nums = explode(' ', $nums);
// USE INDEX NUMBER TO CHOOSE NAME
foreach ($nums as $num)
{
$out .= $data1[$num] . ' ';
}
// RECOVER THE RIGHTMOST DATA STRING AND SAVE THE ELEMENT IN THE ARRAY
$out .= $ends;
$data3[] = $out;
}
// SHOW THE WORK PRODUCT
print_r($data3);
// WRITE: http://php.net/manual/en/function.file-put-contents.php