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function test()
{
global $aa;
echo $aa;
}
test(); //print test
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$aa="test"
function test()
{
echo $aa;
}
test() // print ²»Êä³öÈκζ«Î÷
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$a="hello";
$b=&$a;
unset($b);
$b="world";
echo $a;
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$$str="landog";
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<input type="text" name="name" ><input type="submit" name="a">
</form>
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C.$_SESSION['name']
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E.$_GLOBAL['name']
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<?php
for($a =1;$a<=9;$a++)
{
for($b =1;$b<=$a;$b++)
{$c =$a *$b;
echo "$a*$b=$c ";
}
echo "<p>";
}
?> ......