Tutorial :Find and edit text files via PHP



Question:

Let say a text file contain

Hello everyone, My name is Alice, i stay in Canada.

How do i use php to find "Alice" and replace it with "John".

    $filename = "C:\intro.txt";      $fp = fopen($filename, 'w');      //fwrite($fp, $string);      fclose($fp);  


Solution:1

$contents = file_get_contents($filename);  $new_contents = str_replace('Alice', 'John', $contents);  file_put_contents($filename, $new_contents);  


Solution:2

Read the file into memory using fread(). Use str_replace() and write it back.


Solution:3

If its a big file, use iteration instead of reading all into memory

$f = fopen("file","r");  if($f){      while( !feof($f) ){          $line = fgets($f,4096);          if ( (stripos($line,"Alice")!==FALSE) ){              $line=preg_replace("/Alice/","John",$line);          }          print $line;      }      fclose($f);  }  

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