I have a csv file that is 2Mb size, and has pipe delimiter. I would like to take the first row and replace its data then resave the file. Here is what I did :
//Creating a new first row with the modified data.
$file = fopen($path,"r");//$path is where the file is located : outputs/my_file.csv
$size = filesize($path);
$firstLine = fgetcsv(fopen($path,"r")); //$firstLine has all the data of the first row as array
fclose($file);
$firstLine = explode("|", $firstLine[0]);//To get each column row
$newHeader = array();
for($i = 0; $i<sizeof($firstLine ); $i++){
if($i == 4){
array_push($newHeader, "modified column in row 1 ");//Only column 4 in row 1 is modified
}else{
array_push($newHeader, $firstLine [$i]);
}
}
$Header = implode("|", $newHeader);
//Creating the new csv file
$row = 0;
while (($data = fgetcsv(fopen($path,"r"), "|")) !== false) {
if($row == 0){
$data[0] = $Header;
}
$newCsvData[] = $data;
}
return $newCsvData; //I wanted to display the new content of the csv before saving it
This code should print the new content of the csv file that I will store but I get an error : Allowed memory size of 536870912 bytes exhausted (tried to allocate 332 bytes) How can I do that in a very fast way ? the file is about 19122 row.
Thanks