C Data Handles
    
 

 
    (PHP 7 >= 7.4.0, PHP 8)
    


  
    
   
    簡介
    
   
    
    FFI\CData objects can be used in a number of ways as a regular

    PHP data:
    
      
     
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       C data of scalar types can be read and assigned via the $cdata property, e.g. 
       $x = FFI::new('int'); $x->cdata = 42;
      
     
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       C struct and union fields can be accessed as regular PHP object property, e.g.
       $cdata->field
      
     
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       C array elements can be accessed as regular PHP array elements, e.g.
       $cdata[$offset]
      
     
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       C arrays can be iterated using foreach statements.
      
     
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       C arrays can be used as arguments of count().
      
     
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       C pointers can be dereferenced as arrays, e.g. $cdata[0]
      
     
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       C pointers can be compared using regular comparison operators (<,
       <=, ==, !=, >=, >).
      
     
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       C pointers can be incremented and decremented using regular +/-/
       ++/–- operations, e.g. $cdata += 5
      
     
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       C pointers can be subtracted from another using regular - operations.
      
     
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       C pointers to functions can be called as a regular PHP closure, e.g. $cdata()
      
     
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       Any C data can be duplicated using the clone
       operator, e.g. $cdata2 = clone $cdata;
      
     
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       Any C data can be visualized using var_dump(), print_r(), etc.
      
     
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    注意: 
     
      Notable limitations are that FFI\CData instances do not support
      isset(), empty() and unset(),
      and that wrapped C structs and unions do not implement Traversable.
     
    
    
   
    
  
    


  
    
   
    類摘要
    


   
    
    
    
     
    
    

    
    
     
      final
      class FFI\CData
     
     {
    
   }