PHP undefined offset, involves file_put_contents and explode() - php

Question

I am getting undefined offset. Please help, I can't find where's the problem at all :(
<?php
$fileTitle = $_GET['title'];
$rawData = $_GET['data'];
//fileTitle is testing
//rawData is 5000013,0.00,0.00,50.00,0+5006529,0.00,0.00,50.00,0
$lineData = explode("+",$rawData)
for( $i=0 ; $i<count($lineData) ; $i++)
{
$txtFileTitle = $fileTitle.".txt";
$txtFileLineData = $lineData[$i]."\r\n";
$txtFileStatus = file_put_contents($txtFileTitle, $txtFileLineData, FILE_APPEND);
if($txtFileStatus != false)
{
echo "SUCCESS: data written to txt file";
}
else
{
echo "FAIL: could not write to txt file";
}
}?>
The result is a .txt file with:
5000013,0.00,0.00,50.00,0+5006529,0.00,0.00,50.00,0
What i want is a .txt with:
5000013,0.00,0.00,50.00,0
5006529,0.00,0.00,50.00,0

Answer 1

I think the issue was due to the <= in the loop - as the counter begins at zero it would exceed the actual count by one and thus create the undefined index error.
<?php
$title = $_GET['title'];
$data = $_GET['data'];
//title is testing
//data is 5000013,0.00,0.00,50.00,0+5006529,0.00,0.00,50.00,0
$lines = explode( "+", $data );
$file = $title . ".txt";
for( $i=0 ; $i < count( $lines ); $i++ ){
$content = $lines[ $i ] . PHP_EOL;
$status = file_put_contents( $file, $content, FILE_APPEND );
echo $status ? 'SUCCESS: data written to txt file' : 'FAIL: could not write to txt file';
}
?>
edit
The use of + in the source data is ambiguous because the + is used in urls when they are encoded ( space )
<?php
$title = $_GET['title'];
$data = urlencode( $_GET['data'] );
$lines = explode( "+", $data );
$file = __DIR__ . '/' . $title . ".txt";
for( $i=0 ; $i < count( $lines ); $i++ ){
$content = urldecode( $lines[ $i ] ) . PHP_EOL;
$status = file_put_contents( $file, $content, FILE_APPEND );
echo $status ? 'SUCCESS: data written to txt file' : 'FAIL: could not write to txt file';
}
?>

Answer 2

You can simple to use preg_replace function to replace + whith space
$fileTitle = $_GET['title'];
$rawData = $_GET['data'];
$txtFileLineData = preg_replace('/\+/', ' ', $rawData);
$txtFileTitle = $fileTitle.".txt";
$txtFileStatus = file_put_contents($txtFileTitle, $txtFileLineData, FILE_APPEND);
if ($txtFileStatus != false) {
echo "SUCCESS: data written to txt file";
} else {
echo "FAIL: could not write to txt file";
}