Beispiel
Berechnen Sie den MD5 - Hash der Zeichenfolge "Hello" :
<?php
$str = "Hello";
echo md5($str);
?> Führen Sie zB » Definition und Verwendung
Die md5() Funktion berechnet den MD5 Hash einer Zeichenfolge.
Die md5() Funktion verwendet die RSA Data Security, Inc. MD5 Message-Digest Algorithm.
Von RFC 1321 - Der MD5 Message-Digest Algorithm: "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." - "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." - "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." - "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." bei "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." - "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." , "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA." sie "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA."
Um die MD5 - Hash einer Datei zu berechnen, verwenden die md5_file() Funktion.
Syntax
md5( string,raw )
| Parameter | Beschreibung |
|---|---|
| string | Erforderlich. Die Zeichenfolge berechnet werden |
| raw | Optional. Gibt hex oder Binär-Ausgabeformat:
|
Technische Details
| Rückgabewert: | Gibt den berechneten MD5-Hash bei Erfolg oder FALSE bei einem Fehler |
|---|---|
| PHP Version: | 4+ |
| Änderungsprotokoll: | Der rohe Parameter wurde optional in PHP 5.0 |
Mehr Beispiele
Beispiel 1
Drucken Sie das Ergebnis von md5() :
<?php
$str = "Hello";
echo "The string: ".$str."<br>";
echo
"TRUE - Raw 16 character binary format: ".md5($str, TRUE)."<br>";
echo
"FALSE - 32 character hex number: ".md5($str)."<br>";
?> Führen Sie zB » Beispiel 2
Drucken Sie das Ergebnis von md5() und dann testen:
<?php
$str = "Hello";
echo md5($str);
if (md5($str) ==
"8b1a9953c4611296a827abf8c47804d7")
{
echo "<br>Hello
world!";
exit;
}
?> Führen Sie zB » <PHP String Referenz