PHP study notes: Function declaration (2)_PHP tutorial

Copy code The code is as follows:

/*
* 1. Internal functions: PHP can be The purpose of declaring the function
* inside the function is to call
* inside the function to help the external function complete some sub-functions
*
* 2. Recursive function: call your own function name within yourself
*
* 3. Reuse functions
*
* require: for static inclusion
* include: for dynamic inclusion
* require_once: for static inclusion, only included once
* include_once: used for dynamic inclusion, only included once
*
* 4. Use of some system functions
* resource = opendir ("directory name")
* readdir (resource)
*
*
*/
//Internal function
function score($php,$java,$dotnet)
{
function php($php)
{
if($php>60)
return "pass";
else
return "fail";
}
function java($java)
{
if($java>60)
return "pass";
else
return "fail";
}
function dotnet($dotnet)
{
if($dotnet>60)
return "pass";
else
return "fail";
}
$total=$php+$java+$dotnet;
$agv =$total/3;
echo "Your php score is {$php} points,".php($php)."
";
echo "Your java score is {$java } points, ".java($java)."
";
echo "Your dotnet score is {$dotnet} points,".dotnet($dotnet)."
";
echo "Your total score is: {$total}
";
echo "Your average score is: {$agv}
";
}
score( 50,90,70);
//Recursive function
function demo($num)
{
echo $num."
";
if($num>0 )
demo($num-1);
else
echo "-------------------------------- ---
";
echo $num."
";
}
demo(10);
function total($dirname,&$dirnum,&$ filename)
{
$dir=opendir($dirname);
readdir($dir)."
";
readdir($dir)."
";
while($filename=readdir($dir))
{
$newfile=$dirname."/".$filename;
echo $filename."
";
if(is_dir($filename
}
}
$dirnum=0;
$filenum=0;
total("c:/windows",$dirnum,$filenum);
echo "Total number of directories: ".$dirnum."
";
echo "Total number of files: ".$filenum."
";
?>

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