mirror of
https://github.com/ezyang/htmlpurifier.git
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bd64a8346d
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1602 48356398-32a2-884e-a903-53898d9a118a
104 lines
4.3 KiB
PHP
104 lines
4.3 KiB
PHP
<?php
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/**
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* Performs safe variable parsing based on types which can be used by
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* users. This may not be able to represent all possible data inputs,
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* however.
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*/
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class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
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{
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public function parse($var, $type, $allow_null = false) {
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if (!isset(HTMLPurifier_VarParser::$types[$type])) {
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throw new HTMLPurifier_VarParserException("Invalid type $type");
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}
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if ($allow_null && $var === null) return null;
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switch ($type) {
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// Note: if code "breaks" from the switch, it triggers a generic
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// exception to be thrown. Specific errors can be specifically
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// done here.
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case 'mixed':
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return $var;
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case 'istring':
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case 'string':
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case 'text': // no difference, just is longer/multiple line string
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case 'itext':
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if (!is_string($var)) break;
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if ($type === 'istring' || $type === 'itext') $var = strtolower($var);
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return $var;
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case 'int':
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if (is_string($var) && ctype_digit($var)) $var = (int) $var;
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elseif (!is_int($var)) break;
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return $var;
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case 'float':
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if (is_string($var) && is_numeric($var)) $var = (float) $var;
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elseif (!is_float($var)) break;
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return $var;
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case 'bool':
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if (is_int($var) && ($var === 0 || $var === 1)) {
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$var = (bool) $var;
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} elseif (is_string($var)) {
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if ($var == 'on' || $var == 'true' || $var == '1') {
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$var = true;
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} elseif ($var == 'off' || $var == 'false' || $var == '0') {
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$var = false;
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} else {
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throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
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}
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} elseif (!is_bool($var)) break;
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return $var;
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case 'list':
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case 'hash':
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case 'lookup':
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if (is_string($var)) {
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// special case: technically, this is an array with
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// a single empty string item, but having an empty
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// array is more intuitive
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if ($var == '') return array();
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if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
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// simplistic string to array method that only works
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// for simple lists of tag names or alphanumeric characters
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$var = explode(',',$var);
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} else {
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$var = preg_split('/(,|[\n\r]+)/', $var);
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}
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// remove spaces
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foreach ($var as $i => $j) $var[$i] = trim($j);
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if ($type === 'hash') {
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// key:value,key2:value2
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$nvar = array();
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foreach ($var as $keypair) {
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$c = explode(':', $keypair, 2);
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if (!isset($c[1])) continue;
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$nvar[$c[0]] = $c[1];
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}
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$var = $nvar;
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}
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}
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if (!is_array($var)) break;
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$keys = array_keys($var);
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if ($keys === array_keys($keys)) {
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if ($type == 'list') return $var;
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elseif ($type == 'lookup') {
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$new = array();
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foreach ($var as $key) {
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$new[$key] = true;
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}
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return $new;
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} else break;
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}
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if ($type === 'lookup') {
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foreach ($var as $key => $value) {
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$var[$key] = true;
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}
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}
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return $var;
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default:
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// This should not happen!
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throw new HTMLPurifier_Exception("Inconsistency in HTMLPurifier_VarParser_Flexible: $type is not implemented");
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}
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throw new HTMLPurifier_VarParserException("Invalid input for type $type");
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}
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}
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