<code>aa.php
<span><span><?php </span><span>global</span><span>$a</span>;
<span>require</span>(<span>'./b.php'</span>);
<span>echo</span><span>"a ---:$a\n"</span>;
b.php
<span><?php </span><span>$a</span> = <span>123</span>;
php aa.php
输出结果：a ---:<span>123</span>
去掉aa.php 里面的glocal <span>$a</span>
php aa.php
输出结果是 a --:
</span></span></span></code>以上就介绍了php global用法，包括了global,php方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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