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Viewsdelete a line (.txt-File) containing something - with php
I want to delete a line which contains something given by the $_POST['link']
It already works with the .csv-File. At this point, the code for the .txt-File does nohting.
My php code
//txt
$txt = file('../textFiles/websites.txt');
$fpTXT = fopen('../textFiles/websites.txt', 'w');
foreach ($txt as $lines) {
if (!str_contains($lines[2], strval($_POST['link']))) {
fwrite($fpTXT, $lines);
}
}
fclose($fpTXT);
the trigger with js
<!-- Delete-Function -->
<script>
async function deleteRequest(elem) {
$.ajax({
type: 'POST',
url: '/sites/deleting.php',
dataType: 'html',
data: {
'link': elem
}
});
location.reload();
};
</script>
</head>
<!-- Delete Icon -->
<?php $delBtn = "<td><button class='delete' onclick=\"deleteRequest(this.parentNode.parentNode.getElementsByTagName('td')[2].innerText)\"><i class='material-icons'></i></button></td>"; ?>
code for the csv (above the txt-code)
//CSV
$csv = array_map('str_getcsv', file('../textFiles/websites.csv'));
$fpCSV = fopen('../textFiles/websites.csv', 'w');
foreach ($csv as $fields) {
if (!str_contains($fields[2], strval($_POST['link']))) {
fputcsv($fpCSV, $fields);
}
}
fclose($fpCSV);
2 lines from the .txt-File
·
Santiago Trujillo
2 answers
Answer question0
The "$lines" you get from file() is not the same thing as a CSV record. Each of those is a single line, so $lines[2] refers to the third character of that line:
$lines = "https://www.google.com\n";
$lines[2] is just a "t".
While in a CSV record, you would have
$lines = [ "A1", "B1", "C1", "D1" ]
and here, $lines[2] is "C1".
You should filter the text lines to delete the one you don't want
$outputFile = '../textFiles/websites.txt';
$remove = strval($_POST['link']);
$txt = array_filter(
file($outputFile),
function ($eachLine) use ($remove) {
return !str_contains($eachLine, $remove);
// or equivalently,
// return false === strpos($eachLine, $remove)
// In all cases, consider that if someone sends ".",
// you will remove ALL sites, since they'll all have a dot in their site name.
// So maybe is better
// return $remove !== trim($eachLine)
// (the "trim" is needed to get the carriage return at the end of line out of the comparison, which otherwise would always fail).
}
);
// Now you need to write the cleaned file
file_put_contents($outputFile, implode('', $txt));
·
Santiago Trujillo
Report
0
If you just want to replace a word or sentence from the file, you could easily do this with str_replace:
$file = '../textFiles/websites.txt';
$findText = $_POST['link'];
file_put_contents($file, str_replace($findText, '', file_get_contents($file)));
·
Santiago Trujillo
Report
Answer question