New Classes
  
   The following classes were introduced in PHP 5.2.0:
  
  
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     DateTime
    
   
 
   - 
    
     DateTimeZone
    
   
 
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     RegexIterator - extends FilterIterator;
     implements Iterator, Traversable,
     OuterIterator
    
    
     Constants:
    
    
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RegexIterator::ALL_MATCHES
      
      
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RegexIterator::GET_MATCH
      
      
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RegexIterator::MATCH
      
      
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RegexIterator::REPLACE
      
      
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RegexIterator::SPLIT
      
      
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RegexIterator::USE_KEY
      
      
    
    
     Properties:
    
    
    
     Methods:
    
    
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       RegexIterator::__construct(Iterator it, string regex [, int mode [, int flags [, int preg_flags]]])
       - Create an RegexIterator from another iterator and a regular expression
      
     
 
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       bool RegexIterator::accept()
       - Match (string)current() against regular expression
      
     
 
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       bool RegexIterator::getFlags()
       - Returns current operation flags
      
     
 
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       bool RegexIterator::getMode()
       - Returns current operation mode
      
     
 
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       bool RegexIterator::getPregFlags()
       - Returns current PREG flags (if in use or 
NULL)
      
      
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       bool RegexIterator::setFlags(int new_flags)
       - Set operation flags
      
     
 
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       bool RegexIterator::setMode(int new_mode)
       - Set new operation mode
      
     
 
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       bool RegexIterator::setPregFlags(int new_flags)
       - Set PREG flags
      
     
 
    
    
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     RecursiveRegexIterator
    
    
     Constants:
    
    
     - 
      
       
RecursiveRegexIterator::ALL_MATCHES
      
      
     - 
      
       
RecursiveRegexIterator::GET_MATCH
      
      
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RecursiveRegexIterator::MATCH
      
      
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RecursiveRegexIterator::REPLACE
      
      
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RecursiveRegexIterator::SPLIT
      
      
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RecursiveRegexIterator::USE_KEY
      
      
    
    
     Methods:
    
    
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       RecursiveRegexIterator::__construct(RecursiveIterator it, string regex [, int mode [, int flags [, int preg_flags]]])
       - Create an RecursiveRegexIterator from another recursive iterator and
       a regular expression
      
     
 
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       RecursiveRegexIterator RecursiveRegexIterator::getChildren()
       - Return the inner iterator's children contained in a
       RecursiveRegexIterator
      
     
 
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       bool RecursiveRegexIterator::hasChildren()
       - Check whether the inner iterator's current element has children