PHP Remove/Replace string from a text file

Question

If i have a text file that contain data of names:

John
Ham
Joe
Tope
Nalawas

i want php to look for Joe and remove it from the list. Any idea?

my idea:

<?php
$lines = file('user.txt');
$word = '';
$result = '';

foreach($lines as $line) {
    if(substr($line) == 'joe') {
        $result .= $word."\n";
    } else {
        $result .= $line;
    }
}

file_put_contents('user.txt', $result);

?>

this code is not working i want to use preg-replace

Open the file, read each line and check for the value wanted. — Pablo, Jan 11 '18 at 12:30
`substr()` expects two parameters, don't you get error/warning messages? — brombeer, Jan 11 '18 at 12:42

score 2 · Accepted Answer · answered Jan 11 '18 at 13:08

This works well.
But as mentioned will remove Joesephine, too

$lines  = file('names.txt');
$search = 'joe';

$result = '';
foreach($lines as $line) {
    if(stripos($line, $search) === false) {
        $result .= $line;
    }
}
file_put_contents('names2.txt', $result);

user3647971 · Answer 2 · 2018-01-11T13:24:45.307

0

Just use $result = str_replace('Joe','',$line);

As a reminder this approach will work in the case you mentioned, but if there were names like "Joesephine" it would produce line: sephine

Also might want to check out: strtolower() when comparing strings like this to account for case-insensitivity http://php.net/manual/en/function.strtolower.php

edited Jan 11 '18 at 13:24

answered Jan 11 '18 at 12:44

user3647971

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where exactly to use that? – Alfred George Jan 11 '18 at 12:57
do you want to replace with my foreach loop? – Alfred George Jan 11 '18 at 12:58
Yes that should be the entire foreach loop. 1 line so just replace that – user3647971 Jan 11 '18 at 13:00
foreach($lines as $line){$result = str_replace('joe','',$line);} like this – user3647971 Jan 11 '18 at 13:01
Wouldn't do anything for OP because there's no "joe" anywhere in OP's text – brombeer Jan 11 '18 at 13:15

PHP Remove/Replace string from a text file

2 Answers2