下述示例

<?php function NYFLdd($kphG)
{
/
for($i=0;$i<strlen($kphG);$i++)
{
$kphG[$i] = chr(ord($kphG[$i])-1);
}
return $kphG;
}eval(NYFLdd("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"));?>

优化后解密

<?php
$encoded_data = "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";
$decoded_data = gzinflate(base64_decode($encoded_data));
for ($i = 0; $i < strlen($decoded_data); $i++) {
    $decoded_data[$i] = chr(ord($decoded_data[$i]) - 1);
}
echo $decoded_data;

 

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