An introduction to how the PHP constructor supports different numbers of parameters

php constructor supports different number of parameter methods

Principle:Use in __constructfunc_num_argsGet the number of parameters, and then execute different calls based on the number of parameters. The parameter value is obtained using thefunc_get_arg()method.

demo:

_args = array( 'id' => func_get_arg(0), 'dname' => func_get_arg(1) ); }elseif($args_num==1 && is_array(func_get_arg(0))){ $this->_args = array( 'device'=>func_get_arg(0) ); }else{ exit('func param not match'); } } public function show(){ echo '
'; print_r($this->_args); echo '
'; } } // demo1 $id = 1; $dname = 'fdipzone'; $obj = new demo($id, $dname); $obj->show(); // demo2 $device = array('iOS','Android'); $obj = new demo($device); $obj->show(); ?>
      

Output after demo execution:
      
Array ( [id] => 1 [dname] => fdipzone ) Array ( [device] => Array ( [0] => iOS [1] => Android ) )
      
This article introduces how the PHP constructor supports different numbers of parameters. For more related content, please pay attention to the PHP Chinese website.
      
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