New Functions
   
    In PHP 5 there are some new functions. Here is the list of them:
   
   Arrays:
    
    - 
     
      array_combine() - Creates an array by using one array
      for keys and another for its values
     
    
- 
     
      array_diff_uassoc() - Computes the difference of
      arrays with additional index check which is performed by a user supplied
      callback function
     
    
- 
     
      array_udiff() - Computes the difference of arrays by
      using a callback function for data comparison
     
    
- 
     
      array_udiff_assoc() - Computes the difference of
      arrays with additional index check. The data is compared by using a
      callback function
     
    
- 
     
      array_udiff_uassoc() - Computes the difference of
      arrays with additional index check. The data is compared by using a
      callback function. The index check is done by a callback function also
     
    
- 
     
      array_walk_recursive() - Apply a user function
      recursively to every member of an array
     
    
- 
     
      array_uintersect_assoc() - Computes the intersection of
      arrays with additional index check. The data is compared by using a
      callback function
     
    
- 
     
      array_uintersect_uassoc() - Computes the intersection of
      arrays with additional index check. Both the data and the indexes are compared
      by using separate callback functions
     
    
- 
     
      array_uintersect() - Computes the intersection of arrays.
      The data is compared by using a callback function
     
    
InterBase:
   
   iconv:
   
   Streams:
   
   Date and time related:
   
   Strings:
   
    - 
     
      str_split() - Convert a string to an array
     
    
- 
     
      strpbrk() - Search a string for any of a set of
      characters
     
    
- 
     
      substr_compare() - Binary safe optionally case
      insensitive comparison of two strings from an offset, up to length
      characters
     
    
Other:
   
   Note: 
    
     The Tidy extension has also changed its
     API completely.