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10 lines
202 B
10 lines
202 B
<?php
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//可变变量,有点像c语言里得宏
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$a='hallo';
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echo $a.'<br>';
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$$a='world'; //=>${$a}='world' =>($a='hallo')=> $hallo='world'
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echo $$a.'<br>';
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echo ${$a}.'<br>';
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?>
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