how to delete a specific line from a file starting a string in php

Question

I have a text file names data.dat containing space separated strings on each line. I want to delete a whole line starting with a specific from it, Please provide tested php code for it. I'm using php 5.4+

File Contents :

abc samle sample
this abc sample
xyz test sample sample

For example, I have $str="this". So in this case I want to delete 2nd line, For general that could occur at first line or middle or end. Main thing is I dont want any empty line. So new file should be

abc samle sample
xyz test sample sample

This looks like your asking us to complete your homework for you :( — OlliM, Mar 03 '15 at 11:46
The principle here is that you provide the code and we help you to get it working. — BigScar, Mar 03 '15 at 11:48
First go through the similar questions like given and then upload your code if you find an error... http://stackoverflow.com/questions/5712878/how-to-delete-a-line-from-the-file-with-php — Hirdesh Vishwdewa, Mar 03 '15 at 12:16

score 3 · Accepted Answer · answered Mar 03 '15 at 12:46

3

Try with this:

<?php
    $f = "data.dat";

    $term = "this";

    $arr = file($f);

    foreach ($arr as $key=> $line) {

        //removing the line
        if(stristr($line,$term)!== false){unset($arr[$key]);break;}
    }

    //reindexing array
    $arr = array_values($arr);

    //writing to file
    file_put_contents($f, implode($arr));
?>

answered Mar 03 '15 at 12:46

Whirlwind

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Thanks, I did this ` – Jamshad Ahmad Mar 05 '15 at 11:54

how to delete a specific line from a file starting a string in php

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