hhvm/hphp/test/vm/exceptions7.php

<?php

function handler($name, $obj, $args, $data, &$done) {
  echo "----HANDLER----\n";
  var_dump($name, $obj, $args, $data, $done);
  echo "---------------\n";
  throw new Exception;
}

function passthrough_handler($name, $obj, $args, $data, &$done) {
  echo "----HANDLER----\n";
  var_dump($name, $obj, $args, $data, $done);
  $done = false;
  echo "---------------\n";
  throw new Exception;
}

class MagicCall {
  public function __call($name, $args) {
    echo "magic call! ";
    var_dump($name, $args);
    echo "\n";
    throw new Exception;
  }
}

function frap($arg) {
  echo "frap $arg\n";
}

// Intercept a function
fb_intercept('frap', 'handler', 'data');
try {
  call_user_func('frap', 'callfunc');
} catch (Exception $e) {
  echo "caught call user func 1\n";
}

fb_intercept('frap', 'passthrough_handler');
try {
  call_user_func('frap', 'callfunc');
} catch (Exception $e) {
  echo "caught call user func 2\n";
}

// Replace with closure
fb_intercept('frap', function () {
                       echo "Closure! wooooo\n";
                       throw new Exception;
                     });
try {
  call_user_func("frap", 'claptrap');
} catch (Exception $e) {
  echo "caught closure 1\n";
}

// Replace with __call-having object
$mc = new MagicCall();
fb_intercept('frap', array($mc, 'i_dont_exist'));
try {
  call_user_func("frap", 'claptrap');
} catch (Exception $e) {
  echo "caught magic call 1\n";
}

class Blark {
  public static function sfrap() {
    echo "static frap\n";
  }
  public function frap() {
    echo "non-static frap\n";
  }
}
$mc = new MagicCall();

// Intercept static method
fb_intercept('Blark::sfrap', 'handler');
try {
  call_user_func(array('Blark', 'sfrap'));
} catch (Exception $e) {
  echo "caught static call 1\n";
}

fb_intercept('Blark::sfrap', 'passthrough_handler');
try {
  call_user_func(array('Blark', 'sfrap'));
} catch (Exception $e) {
  echo "caught static call 2\n";
}

fb_intercept('Blark::sfrap', array($mc, 'i_dont_exist_either'));
try {
  call_user_func(array('Blark', 'sfrap'));
} catch (Exception $e) {
  echo "caught magic call 2\n";
}

// Intercept non-static method
$b = new Blark();
fb_intercept('Blark::frap', 'handler');
try {
  call_user_func(array($b, 'frap'));
} catch (Exception $e) {
  echo "caught non-static call 1\n";
}

fb_intercept('Blark::frap', 'passthrough_handler');
try {
  call_user_func(array($b, 'frap'));
} catch (Exception $e) {
  echo "caught non-static call 2\n";
}

fb_intercept('Blark::frap', array($mc, 'i_dont_exist_either'));
try {
  call_user_func(array($b, 'frap'));
} catch (Exception $e) {
  echo "caught magic call 3\n";
}

// MULTI-INTERCEPT!
fb_intercept('frap', 'handler');
fb_intercept('handler', 'passthrough_handler');
try {
  call_user_func("frap", 'claptrap');
} catch (Exception $e) {
  echo "caught double intercept 1\n";
}

// Intercept __call
fb_intercept('MagicCall::__call', 'handler');
try {
  call_user_func(array($mc, "blark"), 'hi');
} catch (Exception $e) {
  echo "caught __call 1\n";
}
fb_intercept('MagicCall::__call', 'passthrough_handler');
try {
  call_user_func(array($mc, "blark"), 'ho');
} catch (Exception $e) {
  echo "caught __call 2\n";
}