PHP how to remove strings from a file - php

Question

I have a file named test.txt and i want to remove the lines from this file which have length of less than 30 characters and line starting with Capital letter word and ending with an dot or question mark should not be deleted.
For example content of test.txt file is:
text 1
text 2
text 3
Long text.
text 4
Long text 2?
After filtering, result should be
Long text.
Long text 2?
<?php
# create and load the HTML
include('simple_html_dom.php');
$tekst = file_get_html('http://www.naszawiedza.pl/')->plaintext;
foreach ($tekst as $key=>&$value) {
if (strlen($value) > 60) {
unset($yourArray[$key]);
}
}
echo $tekst;
//kropka
$string = $tekst;
$substr = '.';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//znak zapytania
$string = $tekst;
$substr = '?';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//podwójna spacja
$string = $tekst;
$substr = '\r\n\r\n';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//Wykrzyknik
$string = $tekst;
$substr = '!';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//tabulator
$string = $tekst;
$substr = ' ';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
echo $newstring;
// zmienna $dane, która będzie zapisana
// może także pochodzić z formularza np. $dane = $_POST['dane'];
$dane = $newstring;
// przypisanie zmniennej $file nazwy pliku
$file = "testy.txt";
// uchwyt pliku, otwarcie do dopisania
$fp = fopen($file, "a");
// blokada pliku do zapisu
flock($fp, 2);
// zapisanie danych do pliku
fwrite($fp, $dane);
// odblokowanie pliku
flock($fp, 3);
// zamknięcie pliku
fclose($fp);
//usun puste wiersze
$plik = "testy.txt";
// odczyt
$bufor = array();
$fd = fopen($plik, "r");
while (!feof ($fd))
{
$linia = fgets($fd, 1024);
if(strlen(trim($linia)))
{
$bufor[] = $linia;
}
}
fclose($fd);
// zapis
$fdw = fopen($plik, "w");
foreach($bufor as $wiersz)
{
fwrite($fdw, $wiersz);
}
fclose($fdw);

Answer 1

Here is an sample code that will do this thing
test.txt contents:
text 1
text 2
Long text.
text3
Long text 2?
Line with 30 characters ending with a question mark?
text4
<?php
$file = fopen("test.txt", "r");
$i = 0;
$string = "";
while(!feof($file))
{
// get the line
$line = trim(fgets($file));
// check if line have 30 characters
if(strlen($line) > 30)
{
// get first character ascai value
$value = ord(substr($line, 0, 1));
// get the last character
$last = substr($line, -1);
// now check if it has allowed criteria
if((($value >= 65 && $value <= 90) && ($last == '.' || $last == '?')))
{
$string .= $line."\n";
}
}
}
fclose($file);
// put the proccessed content back to file
file_put_contents("test.txt", trim($string));
?>
Ouput after executing code
Line with 30 characters ending with a question mark?
hope it will help you

Answer 2

Full program code. It gives me empty file. Should be here only sentences with more than 30 chars and with capital letter on beginning and question mark or dot at the end.
<?php
# create and load the HTML
include('simple_html_dom.php');
$tekst = file_get_html('http://www.naszawiedza.pl/')->plaintext;
foreach ($tekst as $key=>&$value) {
if (strlen($value) > 60) {
unset($yourArray[$key]);
}
}
echo $tekst;
//kropka
$string = $tekst;
$substr = '.';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//znak zapytania
$string = $tekst;
$substr = '?';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//podwójna spacja
$string = $tekst;
$substr = '\r\n\r\n';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//Wykrzyknik
$string = $tekst;
$substr = '!';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
//tabulator
$string = $tekst;
$substr = ' ';
$attachment = "\r\n";
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
echo $newstring;
// zmienna $dane, która będzie zapisana
// może także pochodzić z formularza np. $dane = $_POST['dane'];
$dane = $newstring;
// przypisanie zmniennej $file nazwy pliku
$file = "testy.txt";
// uchwyt pliku, otwarcie do dopisania
$fp = fopen($file, "a");
// blokada pliku do zapisu
flock($fp, 2);
// zapisanie danych do pliku
fwrite($fp, $dane);
// odblokowanie pliku
flock($fp, 3);
// zamknięcie pliku
fclose($fp);
//usun puste wiersze
$plik = "testy.txt";
// odczyt
$bufor = array();
$fd = fopen($plik, "r");
while (!feof ($fd))
{
$linia = fgets($fd, 1024);
if(strlen(trim($linia)))
{
$bufor[] = $linia;
}
}
fclose($fd);
// zapis
$fdw = fopen($plik, "w");
foreach($bufor as $wiersz)
{
fwrite($fdw, $wiersz);
}
fclose($fdw);
$file = fopen("testy.txt", "r");
$i = 0;
$string = "";
while(!feof($file))
{
// get the line
$line = trim(fgets($file));
// check if line have 30 characters
if(strlen($line) > 30)
{
// get first character ascai value
$value = ord(substr($line, 0, 1));
// get the last character
$last = substr($line, -1);
// now check if it has allowed criteria
if((($value >= 65 && $value <= 90) && ($last == '.' || $last == '?')))
{
$string .= $line."\n";
}
}
}
fclose($file);
// put the proccessed content back to file
file_put_contents("testy.txt", trim($string));
?>