Echo ' <? '; return empty

Echo ' The output is empty, considering that it may have been parsed by PHP
But what I want to do is to textare the PHP statement directly back to the results of PHP parsing
Can be implemented with Eval but cannot return any errors,

So I want to write a file, read the way to solve the file
Is there any good way to solve this?

if (empty ($_request)) {

$html = <<< EOF

Submit


EOF;
Echo $html;
}else{

$content = $_REQUEST['content']; $content = preg_replace('/；/',';',$content);// 分号容易犯错    $string  = addslashes($content);    // echo $string;    // echo '
';    if(eval($string) === false){        echo '输入错误';    }

}

Reply content:

Echo ' output is empty, considering that it may have been parsed by PHP
But what I want to do is to textare the PHP statement directly back to the results of PHP parsing
Can be implemented with Eval but cannot return any errors,

So I want to write a file, read the way to solve the file
Is there any good way to solve this?

if (empty ($_request)) {

$html = <<< EOF

Submit


EOF;
Echo $html;
}else{

$content = $_REQUEST['content']; $content = preg_replace('/；/',';',$content);// 分号容易犯错    $string  = addslashes($content);    // echo $string;    // echo '
';    if(eval($string) === false){        echo '输入错误';    }

}

Echo '

You want to output the contents of < > and other special symbols to the Web page, to be processed with the Htmlspecialchars function ... Not addslashes, Addslashes is used to deal with SQL filtering ...

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