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12.11.2007 at 09:41AM PST, ID: 23016160
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8.4

Using php delete line from txt file.

Asked by justmelat in PHP Scripting Language

Tags: , , , ,

I am doing some forward thinking on a project i'm working on.

With the help of some gurus here I got the attached code working perfectly.  I am anticipating that my boss will want to be able to delete a word from this text file at some point.

I came across this set of instructions while trying to figure out if it is possible.
Use filegetcontents() to read the file into a string.

Use explode() to get the contents of the file/string into an array (since they're just single items, right?).

Loop through the array to remove what you wanted to remove.

Output the array (using implode()) back to the file.

My questions:

1) is it possible to delete a line from a text file using php?
2) are the instructions above doable?
3) if they are doable how would i code it and incorporate it into the code attached?

I am thinking that I will have button that takes the user to another page where a dropdown box containing the results (contents of
txt file, which is just one column of names) is located, then they just select the words they want removed from the text file.

I know u are saying, it should be in a db, but for some unknown reason, they want this file to remain a txt file.Start Free Trial 
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<?php
 
session_start();
$phpself = $_SERVER['PHP_SELF'];
 
if ($_POST['btnAddWord'] == 'Add' )
	{
		$newWord = trim($txt_newWord);
		//echo "Word to be added: ".$newWord."<br><br>";
 
		$myFile = 'filterlist.txt';
		//echo $myFile."<br><br>";
		
		file_put_contents($myFile, $newWord . PHP_EOL, FILE_APPEND) or die("can't open file");
		
		/*$fh = fopen($myFile, 'a') or die("can't open file");
		
		$stringData = $newWord;
		fwrite($fh, $stringData);*/
		
		//fclose($fh);
		echo "<b><font size=4 color=#000080>New Word Successfully added to Bad Word Filter List.</b></font>";
		echo "<script>setTimeout(\"document.location.href = 'badWordFilter.php'\",2000)</script>";
 
	}
	else 
{
		
	echo "<b><font size=5 color=#000080>Bad Word Filter</font></b><br>";
 
	echo "<form method=POST action=$phpself name=frmWordFilter>";
	
	
	echo "<br><b>Add New Word to Filtered List:</b><br><input type=text name=txt_newWord size=35>";
	echo "<p><input type=submit value=Add name=btnAddWord></p>";
	echo "</form>";
echo "<hr color=#000080 width=85% size=3>";
$myFile = "filterlist.txt";
$fh = fopen($myFile, 'r');
$theData = implode(', ', file($myFile));
 
 
$lines = file('filterlist.txt');
echo "<br><b>Current List:  </b><br><br>";
// Loop through our array, show HTML source as HTML source; and line numbers too.
 
foreach ($lines as $line_num => $line) 
{
	echo "Word #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br />\n";
}
 
// Another example, let's get a web page into a string.  See also file_get_contents().
$html = implode('', file('filterlist.txt'));
 
//$theData = implode(",", fread($fh, filesize($myFile)));
fclose($fh);
 
echo "<br><b>Current List:  </b>".$theData;		
}
 
?>
 
Keywords: Using php delete line from txt file.
Title
1 Convert CSV string
2 implode/explode
3 Using implode/explode with strings
4 Array explode and implode
5 Adding CSV data into a MySQL Databa…
6 explode directory ?
 
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[+][-]12.11.2007 at 11:37AM PST, ID: 20451954

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About this solution

Zone: PHP Scripting Language
Tags: php, line, delete, file, from
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Solution Provided By: Michael701
Participating Experts: 4
Solution Grade: B
 
 
 
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