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ÎļþÃû£ºfunction.php
<?php
//×Ô¶¨Ò庯Êý
echo " <b>×Ô¶¨Ò庯Êý£º </b> <br>";

function square($A)
{
return $A*$A;
}

$A=4;
echo $A."µÄƽ·½ÊÇ£º".square($A)." <br>";

echo " <br>";

//±äÁ¿µÄ×÷Ó÷¶Î§--¾Ö²¿±äÁ¿¡¢È«¾Ö±äÁ¿¡¢¾²Ì¬±äÁ¿
echo " <b>±äÁ¿µÄ×÷Ó÷¶Î§--¾Ö²¿±äÁ¿¡¢È«¾Ö±äÁ¿¡¢¾²Ì¬±äÁ¿£º </b> <br>";

$B=10;
$C=20;

function var_range(){
static $D=30;

if($D==30){
$B=15;
echo "¾Ö²¿±äÁ¿\$BµÄÖµÊÇ£º$B <br> <br>";

echo "ʹÓÃ\$GLOBALSÈ«¾Ö±äÁ¿Êý×éÏÔʾȫ¾Ö±äÁ¿\$CµÄÖµ£º".$GLOBALS["C"]." <br> <br>";

global $C;
$C+=5;
}

echo "¾²Ì¬±äÁ¿\$DµÄÖµÊÇ£º$D <br> <br>";
$D+=2;
}

for($i=1;$i <=3;$i++)
var_range();

echo "È«¾Ö±äÁ¿\$BµÄÖµÊÇ£º$B <br> <br>";
echo "È«¾Ö±äÁ¿\$CµÄÖµÊÇ£º$C <br>";

echo " <br>";

//º¯Êý²ÎÊýµÄ´«µÝ
echo " <b>º¯Êý²ÎÊýµÄ´«µÝ£º </b> <br>";

echo "a.°´Öµ´«µÝ²ÎÊýÓë°´µØÖ·´«µÝ²ÎÊý£º <br>";

$E=50;


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