PHP/Utility Function/passthru

passthru() function works like exec(), except that the command output is automatically output.

   <source lang="html4strict">

Its syntax is: void passthru (string command [, int return_variable]) If return_variable is provided, it will be assigned the command return status. use passthru() to view the uptime of the server <?

 passthru("uptime");

?>

 </source>
   
  

Using passthru() to Output Binary Data

   <source lang="html4strict">

<?php if ( isset( $_REQUEST["image"] ) && file_exists( $_REQUEST["image"] ) ) {

 header( "Content-type: image/gif" );
 $image = $_REQUEST["image"];
 passthru(  "giftopnm $image |
       pnmscale -xscale .5 -yscale .5 |
       ppmquant 256 | ppmtogif" );

} else {

 print "The image ".$_REQUEST["image"]." could not be found";

} ?>

 </source>
   
  

Using the PHP passthru() Function

   <source lang="html4strict">

<?php

       passthru("ls", $return_val);
       echo "Exit code of $return_val\n";

?>

 </source>
   
  

void passthru ( string command [, int &return_var] ) runs an external program

   <source lang="html4strict">

<?

   passthru("who");

?>

 </source>