libraries/Error.class.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Holds class PMA_Error
   5  *
   6  * @package phpMyAdmin
   7  */
   8
   9 /**
  10  * base class
  11  */
  12 require_once './libraries/Message.class.php';
  13
  14 /**
  15  * a single error
  16  *
  17  * @package phpMyAdmin
  18  */
  19 class PMA_Error extends PMA_Message
  20 {
  21     /**
  22      * Error types
  23      *
  24      * @var array
  25      */
  26     static public $errortype = array (
  27         E_ERROR              => 'Error',
  28         E_WARNING            => 'Warning',
  29         E_PARSE              => 'Parsing Error',
  30         E_NOTICE             => 'Notice',
  31         E_CORE_ERROR         => 'Core Error',
  32         E_CORE_WARNING       => 'Core Warning',
  33         E_COMPILE_ERROR      => 'Compile Error',
  34         E_COMPILE_WARNING    => 'Compile Warning',
  35         E_USER_ERROR         => 'User Error',
  36         E_USER_WARNING       => 'User Warning',
  37         E_USER_NOTICE        => 'User Notice',
  38         E_STRICT             => 'Runtime Notice',
  39         E_DEPRECATED         => 'Deprecation Notice',
  40         E_RECOVERABLE_ERROR  => 'Catchable Fatal Error',
  41     );
  42
  43     /**
  44      * Error levels
  45      *
  46      * @var array
  47      */
  48     static public $errorlevel = array (
  49         E_ERROR              => 'error',
  50         E_WARNING            => 'warning',
  51         E_PARSE              => 'error',
  52         E_NOTICE             => 'notice',
  53         E_CORE_ERROR         => 'error',
  54         E_CORE_WARNING       => 'warning',
  55         E_COMPILE_ERROR      => 'error',
  56         E_COMPILE_WARNING    => 'warning',
  57         E_USER_ERROR         => 'error',
  58         E_USER_WARNING       => 'warning',
  59         E_USER_NOTICE        => 'notice',
  60         E_STRICT             => 'notice',
  61         E_DEPRECATED         => 'notice',
  62         E_RECOVERABLE_ERROR  => 'error',
  63     );
  64
  65     /**
  66      * The file in which the error occured
  67      *
  68      * @var string
  69      */
  70     protected $_file = '';
  71
  72     /**
  73      * The line in which the error occured
  74      *
  75      * @var integer
  76      */
  77     protected $_line = 0;
  78
  79     /**
  80      * Holds the backtrace for this error
  81      *
  82      * @var array
  83      */
  84     protected $_backtrace = array();
  85
  86     /**
  87      * Unique id
  88      *
  89      * @var string
  90      */
  91     protected $_hash = null;
  92
  93     /**
  94      * Constructor
  95      *
  96      * @uses    debug_backtrace()
  97      * @uses    PMA_Error::setNumber()
  98      * @uses    PMA_Error::setMessage()
  99      * @uses    PMA_Error::setFile()
 100      * @uses    PMA_Error::setLine()
 101      * @uses    PMA_Error::setBacktrace()
 102      * @param   integer $errno
 103      * @param   string  $errstr
 104      * @param   string  $errfile
 105      * @param   integer $errline
 106      */
 107     public function __construct($errno, $errstr, $errfile, $errline)
 108     {
 109         $this->setNumber($errno);
 110         $this->setMessage($errstr, false);
 111         $this->setFile($errfile);
 112         $this->setLine($errline);
 113
 114         $backtrace = debug_backtrace();
 115         // remove last two calls: debug_backtrace() and handleError()
 116         unset($backtrace[0]);
 117         unset($backtrace[1]);
 118
 119         $this->setBacktrace($backtrace);
 120     }
 121
 122     /**
 123      * sets PMA_Error::$_backtrace
 124      *
 125      * @uses    PMA_Error::$_backtrace to set it
 126      * @param   array $backtrace
 127      */
 128     public function setBacktrace($backtrace)
 129     {
 130         $this->_backtrace = $backtrace;
 131     }
 132
 133     /**
 134      * sets PMA_Error::$_line
 135      *
 136      * @uses    PMA_Error::$_line to set it
 137      * @param   integer $line
 138      */
 139     public function setLine($line)
 140     {
 141         $this->_line = $line;
 142     }
 143
 144     /**
 145      * sets PMA_Error::$_file
 146      *
 147      * @uses    PMA_Error::$_file to set it
 148      * @uses    PMA_Error::relPath()
 149      * @param   string $file
 150      */
 151     public function setFile($file)
 152     {
 153         $this->_file = PMA_Error::relPath($file);
 154     }
 155
 156
 157     /**
 158      * returns unique PMA_Error::$_hash, if not exists it will be created
 159      *
 160      * @uses    PMA_Error::$_hash as return value and to set it if required
 161      * @uses    PMA_Error::getNumber()
 162      * @uses    PMA_Error::getMessage()
 163      * @uses    PMA_Error::getFile()
 164      * @uses    PMA_Error::getLine()
 165      * @uses    PMA_Error::getBacktrace()
 166      * @uses    md5()
 167      * @param   string $file
 168      * @return  string PMA_Error::$_hash
 169      */
 170     public function getHash()
 171     {
 172         if (null === $this->_hash) {
 173             $this->_hash = md5(
 174                 $this->getNumber() .
 175                 $this->getMessage() .
 176                 $this->getFile() .
 177                 $this->getLine() .
 178                 $this->getBacktrace()
 179             );
 180         }
 181
 182         return $this->_hash;
 183     }
 184
 185     /**
 186      * returns PMA_Error::$_backtrace
 187      *
 188      * @uses    PMA_Error::$_backtrace as return value
 189      * @return  array PMA_Error::$_backtrace
 190      */
 191     public function getBacktrace()
 192     {
 193         return $this->_backtrace;
 194     }
 195
 196     /**
 197      * returns PMA_Error::$_file
 198      *
 199      * @uses    PMA_Error::$_file as return value
 200      * @return  string PMA_Error::$_file
 201      */
 202     public function getFile()
 203     {
 204         return $this->_file;
 205     }
 206
 207     /**
 208      * returns PMA_Error::$_line
 209      *
 210      * @uses    PMA_Error::$_line as return value
 211      * @return  integer PMA_Error::$_line
 212      */
 213     public function getLine()
 214     {
 215         return $this->_line;
 216     }
 217
 218     /**
 219      * returns type of error
 220      *
 221      * @uses    PMA_Error::$errortype
 222      * @uses    PMA_Error::getNumber()
 223      * @return  string  type of error
 224      */
 225     public function getType()
 226     {
 227         return PMA_Error::$errortype[$this->getNumber()];
 228     }
 229
 230     /**
 231      * returns level of error
 232      *
 233      * @uses    PMA_Error::$$errorlevel
 234      * @uses    PMA_Error::getNumber()
 235      * @return  string  level of error
 236      */
 237     public function getLevel()
 238     {
 239         return PMA_Error::$errorlevel[$this->getNumber()];
 240     }
 241
 242     /**
 243      * returns title prepared for HTML Title-Tag
 244      *
 245      * @uses    PMA_Error::getTitle()
 246      * @uses    htmlspecialchars()
 247      * @uses    substr()
 248      * @return  string   HTML escaped and truncated title
 249      */
 250     public function getHtmlTitle()
 251     {
 252         return htmlspecialchars(substr($this->getTitle(), 0, 100));
 253     }
 254
 255     /**
 256      * returns title for error
 257      *
 258      * @uses    PMA_Error::getType()
 259      * @uses    PMA_Error::getMessage()
 260      * @return string
 261      */
 262     public function getTitle()
 263     {
 264         return $this->getType() . ': ' . $this->getMessage();
 265     }
 266
 267     /**
 268      * Display HTML backtrace
 269      *
 270      * @uses    PMA_Error::getBacktrace()
 271      * @uses    PMA_Error::relPath()
 272      * @uses    PMA_Error::displayArg()
 273      * @uses    count()
 274      */
 275     public function displayBacktrace()
 276     {
 277         foreach ($this->getBacktrace() as $step) {
 278             echo PMA_Error::relPath($step['file']) . '#' . $step['line'] . ': ';
 279             if (isset($step['class'])) {
 280                 echo $step['class'] . $step['type'];
 281             }
 282             echo $step['function'] . '(';
 283             if (isset($step['args']) && (count($step['args']) > 1)) {
 284                 echo "<br />\n";
 285                 foreach ($step['args'] as $arg) {
 286                     echo "\t";
 287                     $this->displayArg($arg, $step['function']);
 288                     echo ',' . "<br />\n";
 289                 }
 290             } elseif (isset($step['args']) && (count($step['args']) > 0)) {
 291                 foreach ($step['args'] as $arg) {
 292                     $this->displayArg($arg, $step['function']);
 293                 }
 294             }
 295             echo ')' . "<br />\n";
 296         }
 297     }
 298
 299     /**
 300      * Display a single function argument
 301      * if $function is one of include/require the $arg is converted te relative path
 302      *
 303      * @uses    PMA_Error::relPath()
 304      * @uses    in_array()
 305      * @uses    gettype()
 306      * @param string $arg
 307      * @param string $function
 308      */
 309     protected function displayArg($arg, $function)
 310     {
 311         $include_functions = array(
 312             'include',
 313             'include_once',
 314             'require',
 315             'require_once',
 316         );
 317
 318         if (in_array($function, $include_functions)) {
 319             echo PMA_Error::relPath($arg);
 320         } elseif (is_scalar($arg)) {
 321             echo gettype($arg) . ' ' . htmlspecialchars($arg);
 322         } else {
 323             echo gettype($arg);
 324         }
 325     }
 326
 327     /**
 328      * Displays the error in HTML
 329      *
 330      * @uses    PMA_Error::getLevel()
 331      * @uses    PMA_Error::getType()
 332      * @uses    PMA_Error::getMessage()
 333      * @uses    PMA_Error::displayBacktrace()
 334      * @uses    PMA_Error::isDisplayed()
 335      */
 336     public function display()
 337     {
 338         echo '<div class="' . $this->getLevel() . '">';
 339         if (! $this->isUserError()) {
 340             echo '<strong>' . $this->getType() . '</strong>';
 341             echo ' in ' . $this->getFile() . '#' . $this->getLine();
 342             echo "<br />\n";
 343         }
 344         echo $this->getMessage();
 345         if (! $this->isUserError()) {
 346             echo "<br />\n";
 347             echo "<br />\n";
 348             echo "<strong>Backtrace</strong><br />\n";
 349             echo "<br />\n";
 350             echo $this->displayBacktrace();
 351         }
 352         echo '</div>';
 353         $this->isDisplayed(true);
 354     }
 355
 356     /**
 357      * whether this error is a user error
 358      *
 359      * @uses    E_USER_WARNING
 360      * @uses    E_USER_ERROR
 361      * @uses    E_USER_NOTICE
 362      * @uses    PMA_Error::getNumber()
 363      * @return  boolean
 364      */
 365     public function isUserError()
 366     {
 367         return $this->getNumber() & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE);
 368     }
 369
 370     /**
 371      * return short relative path to phpMyAdmin basedir
 372      *
 373      * prevent path disclusore in error message,
 374      * and make users feel save to submit error reports
 375      *
 376      * @static
 377      * @uses    PHP_OS()
 378      * @uses    __FILE__()
 379      * @uses    realpath()
 380      * @uses    substr()
 381      * @uses    explode()
 382      * @uses    dirname()
 383      * @uses    implode()
 384      * @uses    count()
 385      * @uses    array_pop()
 386      * @uses    str_replace()
 387      * @param   string $dest  path to be shorten
 388      * @return  string shortened path
 389      */
 390     static function relPath($dest)
 391     {
 392         $dest = realpath($dest);
 393
 394         if (substr(PHP_OS, 0, 3) == 'WIN') {
 395             $path_separator = '\\';
 396         } else {
 397             $path_separator = '/';
 398         }
 399
 400         $Ahere = explode($path_separator, realpath(dirname(__FILE__) . $path_separator . '..'));
 401         $Adest = explode($path_separator, $dest);
 402
 403         $result = '.';
 404         // && count ($Adest)>0 && count($Ahere)>0 )
 405         while (implode($path_separator, $Adest) != implode($path_separator, $Ahere)) {
 406             if (count($Ahere) > count($Adest)) {
 407                 array_pop($Ahere);
 408                 $result .= $path_separator . '..';
 409             } else {
 410                 array_pop($Adest);
 411             }
 412         }
 413         $path = $result . str_replace(implode($path_separator, $Adest), '', $dest);
 414         return str_replace($path_separator . $path_separator, $path_separator, $path);
 415     }
 416 }
 417 ?>