HTMLPurifier_VarParser_Flexible Class Reference

Performs safe variable parsing based on types which can be used by users. More...

Inheritance diagram for HTMLPurifier_VarParser_Flexible:

Collaboration diagram for HTMLPurifier_VarParser_Flexible:

Protected Member Functions
	parseImplementation ($var, $type, $allow_null)
	Actually implements the parsing.
Protected Member Functions inherited from HTMLPurifier_VarParser
	error ($msg)
	Throws an exception.
	errorInconsistent ($class, $type)
	Throws an inconsistency exception.
	errorGeneric ($var, $type)
	Generic error for if a type didn't work.

Additional Inherited Members
Public Member Functions inherited from HTMLPurifier_VarParser
	parse ($var, $type, $allow_null=false)
	Validate a variable according to type.
Static Public Member Functions inherited from HTMLPurifier_VarParser
static	getTypeName ($type)
Data Fields inherited from HTMLPurifier_VarParser
const	STRING = 1
const	ISTRING = 2
const	TEXT = 3
const	ITEXT = 4
const	INT = 5
const	FLOAT = 6
const	BOOL = 7
const	LOOKUP = 8
const	ALIST = 9
const	HASH = 10
const	MIXED = 11
Static Public Attributes inherited from HTMLPurifier_VarParser
static	$types
	Lookup table of allowed types.
static	$stringTypes
	Lookup table of types that are string, and can have aliases or allowed value lists.

Detailed Description

Performs safe variable parsing based on types which can be used by users.

This may not be able to represent all possible data inputs, however.

Definition at line 8 of file Flexible.php.

Member Function Documentation

HTMLPurifier_VarParser_Flexible::parseImplementation (   $var,   $type,   $allow_null  )

protected

Actually implements the parsing.

Base implementation is to not do anything to $var. Subclasses should overload this!

Reimplemented from HTMLPurifier_VarParser.

Definition at line 11 of file Flexible.php.

References HTMLPurifier_VarParser\errorGeneric(), and HTMLPurifier_VarParser\errorInconsistent().

                                                                     {
        if ($allow_null && $var === null) return null;
        switch ($type) {
            // Note: if code "breaks" from the switch, it triggers a generic
            // exception to be thrown. Specific errors can be specifically
            // done here.
            case self::MIXED :
            case self::ISTRING :
            case self::STRING :
            case self::TEXT :
            case self::ITEXT :
                return $var;
            case self::INT :
                if (is_string($var) && ctype_digit($var)) $var = (int) $var;
                return $var;
            case self::FLOAT :
                if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
                return $var;
            case self::BOOL :
                if (is_int($var) && ($var === 0 || $var === 1)) {
                    $var = (bool) $var;
                } elseif (is_string($var)) {
                    if ($var == 'on' || $var == 'true' || $var == '1') {
                        $var = true;
                    } elseif ($var == 'off' || $var == 'false' || $var == '0') {
                        $var = false;
                    } else {
                        throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
                    }
                }
                return $var;
            case self::ALIST :
            case self::HASH :
            case self::LOOKUP :
                if (is_string($var)) {
                    // special case: technically, this is an array with
                    // a single empty string item, but having an empty
                    // array is more intuitive
                    if ($var == '') return array();
                    if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
                        // simplistic string to array method that only works
                        // for simple lists of tag names or alphanumeric characters
                        $var = explode(',',$var);
                    } else {
                        $var = preg_split('/(,|[\n\r]+)/', $var);
                    }
                    // remove spaces
                    foreach ($var as $i => $j) $var[$i] = trim($j);
                    if ($type === self::HASH) {
                        // key:value,key2:value2
                        $nvar = array();
                        foreach ($var as $keypair) {
                            $c = explode(':', $keypair, 2);
                            if (!isset($c[1])) continue;
                            $nvar[trim($c[0])] = trim($c[1]);
                        }
                        $var = $nvar;
                    }
                }
                if (!is_array($var)) break;
                $keys = array_keys($var);
                if ($keys === array_keys($keys)) {
                    if ($type == self::ALIST) return $var;
                    elseif ($type == self::LOOKUP) {
                        $new = array();
                        foreach ($var as $key) {
                            $new[$key] = true;
                        }
                        return $new;
                    } else break;
                }
                if ($type === self::ALIST) {
                    trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
                    return array_values($var);
                }
                if ($type === self::LOOKUP) {
                    foreach ($var as $key => $value) {
                        if ($value !== true) {
                            trigger_error("Lookup array has non-true value at key '$key'; maybe your input array was not indexed numerically", E_USER_WARNING);
                        }
                        $var[$key] = true;
                    }
                }
                return $var;
            default:
                $this->errorInconsistent(__CLASS__, $type);
        }
        $this->errorGeneric($var, $type);
    }

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The documentation for this class was generated from the following file:

• Services/Html/HtmlPurifier/library/HTMLPurifier/VarParser/Flexible.php