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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  * @package Nette\Utils\PhpGenerator
 11:  */
 12: 
 13: 
 14: 
 15: /**
 16:  * PHP code generator utils.
 17:  *
 18:  * @author     David Grudl
 19:  * @package Nette\Utils\PhpGenerator
 20:  */
 21: class PhpHelpers
 22: {
 23:     const PHP_IDENT = '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
 24: 
 25: 
 26:     /**
 27:      * Returns a PHP representation of a variable.
 28:      * @return string
 29:      */
 30:     public static function dump($var)
 31:     {
 32:         return self::_dump($var);
 33:     }
 34: 
 35: 
 36:     private static function _dump(& $var, $level = 0)
 37:     {
 38:         if ($var instanceof PhpLiteral) {
 39:             return $var->value;
 40: 
 41:         } elseif (is_float($var)) {
 42:             $var = var_export($var, TRUE);
 43:             return strpos($var, '.') === FALSE ? $var . '.0' : $var;
 44: 
 45:         } elseif (is_bool($var)) {
 46:             return $var ? 'TRUE' : 'FALSE';
 47: 
 48:         } elseif (is_string($var) && (preg_match('#[^\x09\x20-\x7E\xA0-\x{10FFFF}]#u', $var) || preg_last_error())) {
 49:             static $table;
 50:             if ($table === NULL) {
 51:                 foreach (range("\x00", "\xFF") as $ch) {
 52:                     $table[$ch] = ord($ch) < 32 || ord($ch) >= 127
 53:                         ? '\\x' . str_pad(dechex(ord($ch)), 2, '0', STR_PAD_LEFT)
 54:                         : $ch;
 55:                 }
 56:                 $table["\r"] = '\r';
 57:                 $table["\n"] = '\n';
 58:                 $table["\t"] = '\t';
 59:                 $table['$'] = '\\$';
 60:                 $table['\\'] = '\\\\';
 61:                 $table['"'] = '\\"';
 62:             }
 63:             return '"' . strtr($var, $table) . '"';
 64: 
 65:         } elseif (is_array($var)) {
 66:             $s = '';
 67:             $space = str_repeat("\t", $level);
 68: 
 69:             static $marker;
 70:             if ($marker === NULL) {
 71:                 $marker = uniqid("\x00", TRUE);
 72:             }
 73:             if (empty($var)) {
 74: 
 75:             } elseif ($level > 50 || isset($var[$marker])) {
 76:                 throw new InvalidArgumentException('Nesting level too deep or recursive dependency.');
 77: 
 78:             } else {
 79:                 $s .= "\n";
 80:                 $var[$marker] = TRUE;
 81:                 $counter = 0;
 82:                 foreach ($var as $k => & $v) {
 83:                     if ($k !== $marker) {
 84:                         $s .= "$space\t" . ($k === $counter ? '' : self::_dump($k) . " => ") . self::_dump($v, $level + 1) . ",\n";
 85:                         $counter = is_int($k) ? max($k + 1, $counter) : $counter;
 86:                     }
 87:                 }
 88:                 unset($var[$marker]);
 89:                 $s .= $space;
 90:             }
 91:             return "array($s)";
 92: 
 93:         } elseif (is_object($var)) {
 94:             $arr = (array) $var;
 95:             $s = '';
 96:             $space = str_repeat("\t", $level);
 97: 
 98:             static $list = array();
 99:             if (empty($arr)) {
100: 
101:             } elseif ($level > 50 || in_array($var, $list, TRUE)) {
102:                 throw new InvalidArgumentException('Nesting level too deep or recursive dependency.');
103: 
104:             } else {
105:                 $s .= "\n";
106:                 $list[] = $var;
107:                 foreach ($arr as $k => & $v) {
108:                     if ($k[0] === "\x00") {
109:                         $k = substr($k, strrpos($k, "\x00") + 1);
110:                     }
111:                     $s .= "$space\t" . self::_dump($k) . " => " . self::_dump($v, $level + 1) . ",\n";
112:                 }
113:                 array_pop($list);
114:                 $s .= $space;
115:             }
116:             return get_class($var) === 'stdClass'
117:                 ? "(object) array($s)"
118:                 : __CLASS__ . "::createObject('" . get_class($var) . "', array($s))";
119: 
120:         } else {
121:             return var_export($var, TRUE);
122:         }
123:     }
124: 
125: 
126:     /**
127:      * Generates PHP statement.
128:      * @return string
129:      */
130:     public static function format($statement)
131:     {
132:         $args = func_get_args();
133:         return self::formatArgs(array_shift($args), $args);
134:     }
135: 
136: 
137:     /**
138:      * Generates PHP statement.
139:      * @return string
140:      */
141:     public static function formatArgs($statement, array $args)
142:     {
143:         $a = strpos($statement, '?');
144:         while ($a !== FALSE) {
145:             if (!$args) {
146:                 throw new InvalidArgumentException('Insufficient number of arguments.');
147:             }
148:             $arg = array_shift($args);
149:             if (substr($statement, $a + 1, 1) === '*') { // ?*
150:                 if (!is_array($arg)) {
151:                     throw new InvalidArgumentException('Argument must be an array.');
152:                 }
153:                 $arg = implode(', ', array_map(array(__CLASS__, 'dump'), $arg));
154:                 $statement = substr_replace($statement, $arg, $a, 2);
155: 
156:             } else {
157:                 $arg = substr($statement, $a - 1, 1) === '$' || in_array(substr($statement, $a - 2, 2), array('->', '::'))
158:                     ? self::formatMember($arg) : self::_dump($arg);
159:                 $statement = substr_replace($statement, $arg, $a, 1);
160:             }
161:             $a = strpos($statement, '?', $a + strlen($arg));
162:         }
163:         return $statement;
164:     }
165: 
166: 
167:     /**
168:      * Returns a PHP representation of a object member.
169:      * @return string
170:      */
171:     public static function formatMember($name)
172:     {
173:         return $name instanceof PhpLiteral || !self::isIdentifier($name)
174:             ? '{' . self::_dump($name) . '}'
175:             : $name ;
176:     }
177: 
178: 
179:     /**
180:      * @return bool
181:      */
182:     public static function isIdentifier($value)
183:     {
184:         return is_string($value) && preg_match('#^' . self::PHP_IDENT . '\z#', $value);
185:     }
186: 
187: 
188:     public static function createObject($class, array $props)
189:     {
190:         return unserialize('O' . substr(serialize((string) $class), 1, -1) . substr(serialize($props), 1));
191:     }
192: 
193: }
194: 
Nette Framework 2.0.12 (for PHP 5.2, un-prefixed) API API documentation generated by ApiGen 2.8.0