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Output for 8.3.28 , 8.5.0 libxml version: 2.9.14
object(SimpleXMLElement)#1 (1) {
[0]=>
string(436) "PD9waHAKJG1lID0gX19GSUxFX187CiR4bWwgPSA8PDxFTkRPRlhNTAo8IURPQ1RZUEUgcm9vdApbCjwhRU5USVRZIGZvbyBTWVNURU0gInBocDovL2ZpbHRlci9jb252ZXJ0LmJhc2U2NC1lbmNvZGUvcmVzb3VyY2U9JG1lIj4KXT4KPGZvbz4mZm9vOzwvZm9vPgpFTkRPRlhNTDsKCmVjaG8gImxpYnhtbCB2ZXJzaW9uOiAiIC4gTElCWE1MX0RPVFRFRF9WRVJTSU9OIC4gIlxuXG4iOwokcyA9IHNpbXBsZXhtbF9sb2FkX3N0cmluZygkeG1sLCBudWxsLCBMSUJYTUxfTk9FTlQpOwp2YXJfZHVtcCgkcyk7CmVjaG8gIlxuIjsKdmFyX2R1bXAoYmFzZTY0X2RlY29kZSgkcykpOw=="
}
string(325) "<?php
$me = __FILE__;
$xml = <<<ENDOFXML
<!DOCTYPE root
[
<!ENTITY foo SYSTEM "php://filter/convert.base64-encode/resource=$me">
]>
<foo>&foo;</foo>
ENDOFXML;
echo "libxml version: " . LIBXML_DOTTED_VERSION . "\n\n";
$s = simplexml_load_string($xml, null, LIBXML_NOENT);
var_dump($s);
echo "\n";
var_dump(base64_decode($s));"
Output for 8.4.15 /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15)
/bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15)
/bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1 . Output for 7.4.0 - 7.4.33 , 8.0.1 - 8.0.30 , 8.1.0 - 8.1.33 , 8.2.0 - 8.2.29 , 8.3.0 - 8.3.27 , 8.4.1 - 8.4.14 libxml version: 2.9.4
object(SimpleXMLElement)#1 (1) {
[0]=>
string(436) "PD9waHAKJG1lID0gX19GSUxFX187CiR4bWwgPSA8PDxFTkRPRlhNTAo8IURPQ1RZUEUgcm9vdApbCjwhRU5USVRZIGZvbyBTWVNURU0gInBocDovL2ZpbHRlci9jb252ZXJ0LmJhc2U2NC1lbmNvZGUvcmVzb3VyY2U9JG1lIj4KXT4KPGZvbz4mZm9vOzwvZm9vPgpFTkRPRlhNTDsKCmVjaG8gImxpYnhtbCB2ZXJzaW9uOiAiIC4gTElCWE1MX0RPVFRFRF9WRVJTSU9OIC4gIlxuXG4iOwokcyA9IHNpbXBsZXhtbF9sb2FkX3N0cmluZygkeG1sLCBudWxsLCBMSUJYTUxfTk9FTlQpOwp2YXJfZHVtcCgkcyk7CmVjaG8gIlxuIjsKdmFyX2R1bXAoYmFzZTY0X2RlY29kZSgkcykpOw=="
}
string(325) "<?php
$me = __FILE__;
$xml = <<<ENDOFXML
<!DOCTYPE root
[
<!ENTITY foo SYSTEM "php://filter/convert.base64-encode/resource=$me">
]>
<foo>&foo;</foo>
ENDOFXML;
echo "libxml version: " . LIBXML_DOTTED_VERSION . "\n\n";
$s = simplexml_load_string($xml, null, LIBXML_NOENT);
var_dump($s);
echo "\n";
var_dump(base64_decode($s));"