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24 lines
543 B
24 lines
543 B
<?php
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$a=1;
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$b=2;
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$c=3;
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function func()
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{
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global $a,$b;
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echo "a：$a"; //func内使用global引用了a和b，所以c没有打印出来
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echo "<br> b：$b";
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echo "<br> c：$c";
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}
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function func2()
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{
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echo "<br>a:".$GLOBALS['a']; // $GLOBALS['var'] 指的是函数外部变量本身，是一个变量.在程序的任意位置都能使用
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echo "<br>b:".$GLOBALS['b'];
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echo "<br>c:".$GLOBALS['c'];
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}
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func();
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echo "<br>";
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func2();
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?>
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