案例:PHP案例     状态:不可编辑再运行    进入竖版
 运行结果 
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<?php
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$txt1="Learn PHP";
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$txt2="W3xue.com";
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$cars=array("Volvo","BMW","SAAB");
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echo $txt1;
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echo "\n";
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echo "Study PHP at $txt2";
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echo "\n";
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echo "My car is a {$cars[0]}";
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?>