#!/local/bin/php -q
<?
//
// rename this file to replace, make it executable
// and edit the first line
//

/* Usage: replace infile search-string replace-string
 * UNDER CONSTRUCTION - watch out !!
 * WARNINGS: THIS OVERWRITES THE OLD FILE
 *           Reads the whole file in memory
 * ... ought to work but NO guarantees, test yourself :)
 * inpired from a posting to the PHP List by
 * Brian Schaffner <BSchaffner@accentonline.com>
 */


function SearchLineInFile($infile, $old) {
  echo "  Replace String (Arg3) was empty, 
..... we will just list the lines with string = $old ... \n\n";
  $i = 0;
  $changes = 0;
  if (file_exists($infile)) {
    $fp = fopen($infile, "r");
    if ($fp > 0) {
      // read the file in
      while (!feof($fp)) {
	$buf = fgets($fp, 128);
	if(eregi($old, $buf)) {
	  echo "Found $new on line $i";
	  $changes++;
	}
	$i++;
      }
    }
    fclose($fp);
    echo "\nFound $changes occurences of search string\n";
  }
  else echo "\nWARNING: The file '$infile' does NOT exist !\n";
}

function ChangeLineInFile($infile, $old, $new) {
  echo("  Search String is: $old\n");
  if (!$new)
    echo "  Replace String (Arg3) was empty, 
..... we will just list the lines with string = $old ... \n\n";
  else echo "  Replace String (Arg3) is: $new\n\n";
  $i = 0;
  $changes = 0;
  if (file_exists($infile)) {
    $fp = fopen($infile, "r");
    if ($fp > 0) {
      // read the file in
      while (!feof($fp)) {
	$buf = fgets($fp, 128);
	if(eregi($old, $buf)) {
	  // replace the matched line
	  // $output[$i] = $new;
	  $output[$i] = eregi_replace ($old, $new, $buf);
	  $changes++;
	} else {
	  // or write the same line
	  $output[$i] = $buf;
	}
	$i++;
      }
      fclose($fp);
      echo "\nFound $changes occurences of search string\n";

      if ($new) {
	$fp = @fopen($infile, "w");
	if ($fp > 0) {
	  // spit out the array
	  for ($n = 0; $n < $i; $n++) {
	    // echo $output[$n];
	    fputs($fp, $output[$n]);
	  }
	  fclose($fp);
	  echo "\nMade ALL requested changes, let's hope they are ok !\n";
	}
      }
    }
  }
  else echo "\nWARNING: The file '$infile' does NOT exist !\n";
}

function usage ($user_input) {
  echo (" I got:
   $user_input\n ");
  echo ("Usage:
   SEARCH:  replace file-name string
   REPLACE: replace file-name string replace \n\n");
}


echo "\n\nPHP replace program\n*******************\n";


if ( isset($argv[1]) == 0 ) {
  $input = $argv[1];
  usage ($input);
  exit;
}
else $infile = $argv[1];

if ( isset($argv[2]) == 0 ) {
  $input = $argv[1] . " " . $argv[2] ;
  usage ($input);
  exit;
}
else $old = $argv[2];

if ( isset($argv[3]) == 0 ) {
  $new = FALSE;
  ChangeLineInFile($infile, $old, $new);
} 
else {
  $new = $argv[3];
  ChangeLineInFile($infile, $old, $new);
}

?>