php delete a line from log file that matches with some string value -

i new php. trying delete line log file matches string value.

below code able display matched line log file, wanna delete line , append rest of lines of log file.

below code:

<?php $searchthis = "mystring"; $matches = array();  $handle = @fopen("myfile.log", "r"); if ($handle) {     while (!feof($handle))     {         $buffer = fgets($handle);          if(strpos($buffer, $searchthis) !== false)             $matches[] = $buffer;     }     fclose($handle); }  //show results: print_r($matches); ?> 

edit: lines in log file:

john abraham hml3 john abraham hml1 

$search_string = 'hml3'

function

function search_and_delete($_file,$search_string){         $file = file($_file);         foreach ($file $line_index => $line) {             if(strpos($line, $search_string) !== false){                 unset($file[$line_index]);                 break;             }         }                file_put_contents($_file, implode("",$file)); } 

sample usage

search_and_delete("/var/a.txt","removing_line_conteins");