deleting a line containing a string (help)

[sfchun]

Hello

I opened a file in a variable
and I'm searching for the code to delete (or replace with blank) a line
which contain a specific word/string, the rest of the line is generated and can be different each time.

example :
assuming :
- what is generated randomly is in red
- what i search is in green (and it normaly seen only once in the file)

$file = "1031hc023blablabla461hjk0456"

How i can delete this line ?? (from the string and not the file/string).
Is there a simple code line ? or should i count the line as if it was a file ??
Can i use something like : str_replace or preg_replace ??
I couldn't find an example doing this on the web

someone help ?

[Medyman]

I think this is what you're looking for:

str_replace("blablabla", "", $file); 

[sfchun]

if no mistake, this will replace a part of the string, by nothing,
but the rest of the line will stay.

what i need is to delete the the full line once the 'blablabla' had been found

[Medyman]

Oh, I see now...

The below will do the trick. There are probably other ways do to it. More knowledgable folk might have different recommendations:

<?php 

$file = "1031hc023blablabla461hjk0456";
if (substr_count($file, 'blablabla') > 0) {
    $file = "";
}

?>

This bascially test to see if 'blablabla' is within the string. If it is, it wipes the variable clean.

[sfchun]

it's not exactly what i need, cause in fact my $file variable, contains more than only one line ...

if i use this trick it removes not only the line but also the rest of the variable

[sfchun]

I changed my way of reading the file at the beginning (even if it's not what i wanted to do at first...
but i was wrong in a sens ... my variable was containing ONE line (with all the text) only, so i couldn't logically ask PHP to remove a specific line in it -_-;;;

so rather that get the whole file in a $variable
i read the file lines in an array[],
then i use your trick to test the line and replace it by blank if needed...

now it works...