<?php
  //create your error handler function
  function handler($error\_type,$error_message, 
                   $error\_file,$error_line) {
       
    echo "<h1>Page Error</h1>";
    echo "Errors have occurred while executing this page. Contact the ";
    echo "<a href=\"mailto:admin@yourdomain.com\">;administrator</a> " .
         "to report errors<br><br>";
    echo "<b>Information Generated</b><br><br>";
    echo "<b>Error Type:</b> $error\_type$<br>";
    echo "<b>Error Message:</b> error_message<br>";
    echo "<b>Error Filename:</b> $error\_file$<br>";
    echo "<b>Error Line:</b> error_line";
  }
  
  //set the error handler to be used
  set_error_handler("handler");
  
  //set string with "Wrox" spelled wrong
  $string\_variable\; =\; "Worx\; books\; are\; great!";$//try to use str_replace to replace Worx with Wrox
  //this will generate an E_WARNING
  //because of wrong parameter count
  str_replace("Worx", "Wrox");
  ?>