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129 lines
3.2 KiB
PHP
129 lines
3.2 KiB
PHP
<?php
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/**
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* CJavaScript helper class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright Copyright © 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CJavaScript is a helper class containing JavaScript-related handling functions.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id$
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* @package system.web.helpers
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* @since 1.0
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*/
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class CJavaScript
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{
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/**
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* Quotes a javascript string.
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* After processing, the string can be safely enclosed within a pair of
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* quotation marks and serve as a javascript string.
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* @param string string to be quoted
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* @param boolean whether this string is used as a URL
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* @return string the quoted string
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*/
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public static function quote($js,$forUrl=false)
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{
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if($forUrl)
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return strtr($js,array('%'=>'%25',"\t"=>'\t',"\n"=>'\n',"\r"=>'\r','"'=>'\"','\''=>'\\\'','\\'=>'\\\\'));
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else
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return strtr($js,array("\t"=>'\t',"\n"=>'\n',"\r"=>'\r','"'=>'\"','\''=>'\\\'','\\'=>'\\\\'));
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}
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/**
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* Encodes a PHP variable into javascript representation.
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*
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* Example:
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* <pre>
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* $options=array('key1'=>true,'key2'=>123,'key3'=>'value');
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* echo CJavaScript::encode($options);
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* // The following javascript code would be generated:
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* // {'key1':true,'key2':123,'key3'=>'value'}
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* </pre>
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*
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* For highly complex data structures use {@link jsonEncode} and {@link jsonDecode}
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* to serialize and unserialize.
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*
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* @param mixed PHP variable to be encoded
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* @return string the encoded string
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*/
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public static function encode($value)
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{
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if(is_string($value))
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{
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if(strpos($value,'js:')===0)
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return substr($value,3);
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else
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return "'".self::quote($value)."'";
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}
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else if($value===null)
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return 'null';
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else if(is_bool($value))
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return $value?'true':'false';
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else if(is_integer($value))
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return "$value";
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else if(is_float($value))
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{
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if($value===-INF)
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return 'Number.NEGATIVE_INFINITY';
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else if($value===INF)
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return 'Number.POSITIVE_INFINITY';
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else
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return "$value";
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}
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else if(is_object($value))
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return self::encode(get_object_vars($value));
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else if(is_array($value))
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{
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$es=array();
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if(($n=count($value))>0 && array_keys($value)!==range(0,$n-1))
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{
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foreach($value as $k=>$v)
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$es[]="'".self::quote($k)."':".self::encode($v);
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return '{'.implode(',',$es).'}';
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}
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else
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{
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foreach($value as $v)
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$es[]=self::encode($v);
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return '['.implode(',',$es).']';
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}
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}
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else
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return '';
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}
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/**
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* Returns the JSON representation of the PHP data.
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* @param mixed the data to be encoded
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* @return string the JSON representation of the PHP data.
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*/
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public static function jsonEncode($data)
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{
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if(function_exists('json_encode'))
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return json_encode($data);
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else
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{
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return CJSON::encode($data);
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}
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}
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/**
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* Decodes a JSON string.
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* @param string the data to be decoded
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* @param boolean whether to use associative array to represent object data
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* @return mixed the decoded PHP data
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*/
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public static function jsonDecode($data,$useArray=true)
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{
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if(function_exists('json_decode'))
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return json_decode($data,$useArray);
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else
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return CJSON::decode($data,$useArray);
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}
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}
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