Insert text to particular position in a file

[ashly123]

Hi friends,

 

I am a newbie in string functions in php. I have a text file which contains some lines of text in a particular format.

I am using php to maniputlate this text file.

 

Text1 = This is my first line of text
Text2 = This is my second text
Text3 = This is my third text
Text5 = This is fifth line of text
Text10 = This is tenth line in the file
....
....

 

I would like to insert some missing text at the end or in between the existing lines. For example, I would like to write Text7 in the file in the exact place now. Can anyone please give me a solution for this?

 

After the insertion, the file should look like this:

 

Text1 = This is my first line of text
Text2 = This is my second text
Text3 = This is my third text
Text5 = This is fifth line of text
Text7 = This is seventh line in the file
Text10 = This is tenth line in the file
....
....

 

[teynon]

You will need to read, and rewrite the file with the new line if you are inserting it. If you are appending, you just need to use "A+" in fwrite.

 

To Append:

$file="myFile.txt";

$handle=fopen($file, "A+"); // Open for appending.

fwrite($handle, "Myline");

 

To Insert:

$lineNumber=7;

$myLine="Insert this text.";

$newWrite="";

$insert=0;

$contents=file_get_contents("MyFile.txt");

 

$lines=explode("\r\n", $contents);

foreach ($lines as $line) {

$values=explode("=", $line);

$val=trim(substr($values[0], 0, 4));

if ($val > $lineNumber && $insert==0) {

  $insert=1;

  $newWrite.="Text{$lineNumber} = {$myLine}\r\n";

}

$newWrite.=$line."\r\n";

}

$handle=fopen($file, "w+");

fwrite($handle, $newWrite);

fclose($handle);

[litebearer]

or...

There are several ways to handle this. Structuring your file properly initially is the best approach.

 

ie it appears that you want the lines to ultimately be in sequential order; sooo...

one approach would be to build your file with blank lines ie

 

Text0 = This is my first line of text

Text1 = This is my second text

Text2 = This is my third text

BLANK LINE HERE

Text4 = This is fifth line of text

BLANK LINE HERE

BLANK LINE HERE

BLANK LINE HERE

BLANK LINE HERE

Text9 = This is tenth line in the file

Text10 = This is eleventh line in the file

 

remember with arrays the count starts with 0 being line 1

then

 

<?PHP
$new_line = "Text7 = This is eighth line in the file";
$element_number_to_replace = 7; /* remember the count starts with 0 being line 1 */
$line_array = file($my_text_file);
/*
what your file/ array looks like initially

Text0 = This is my first line of text
Text1 = This is my second text
Text2 = This is my third text
BLANK LINE HERE
Text4 = This is fifth line of text
BLANK LINE HERE
BLANK LINE HERE
BLANK LINE HERE
BLANK LINE HERE
Text9 = This is tenth line in the file
Text10 = This is eleventh line in the file
*/

$line_number_to_insert = 7;
$line_array[$line_number_to_insert] = $new_line;
$all_content = implode("\n", $line_array);
file_put_contents($my_test_file,$all_content);
/*
what your file/ array looks like after

Text0 = This is my first line of text
Text1 = This is my second text
Text2 = This is my third text
BLANK LINE HERE
Text4 = This is fifth line of text
BLANK LINE HERE
BLANK LINE HERE
Text7 = This is eighth line in the file
BLANK LINE HERE
Text9 = This is tenth line in the file
Text10 = This is eleventh line in the file
*7


?>