PHP externally obtains the number of function parameters_PHP tutorial

function War($a,$b,$c)

{

$n = func_num_args();

echo $n;

}

War(1,2,3);

The func_num_args() function can only get the number of parameters inside the function but not outside the function. Is there any way to get the number of function parameters outside?

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func_num_args() gets the number of parameters passed to the host function

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func_num_args() gets the actual number of parameters passed, not the predefined number, so there should be no such thing as "external acquisition"
PHP code

function War()

{

$n = func_num_args();

echo $n;

}

War(1,2,3);

War(1,2,3,4);

War(1,2);
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If you really want to "get it externally", you can use the annotation of the custom function and use reflection to get it

PHP code
/**
* A custom function
*
* @param string $a
* @param string $b
* @param string $c
*/
function War($a,$b,$c){}

/**
* A certain custom function 2
*
* @param s……

http://www.bkjia.com/PHPjc/371715.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/371715.htmlTechArticlefunction War($a,$b,$c) { $n = func_num_args(); echo $n; } War(1,2,3); func_num_args() This function can only get the number of parameters inside the function but not outside the function. Is there any way...