Definiție și utilizare
md5() Funcția calculează MD5 hash a unui șir.
md5() funcția utilizează RSA Data Security, Inc. MD5 Message-Digest algoritm.
De la RFC 1321 - MD5 Message-Digest algoritm: "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." de "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." în "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." în "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." de a "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." în "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."
Pentru a calcula hash MD5 al unui fișier, utilizați md5_file() funcția.
Sintaxă
md5( string,raw )
| Parametru | Descriere |
|---|---|
| string | Necesar. Șirul trebuie calculat |
| raw | Opțional. Specifică hex sau formatul de ieșire binar:
|
Detalii tehnice
| Întoarcere Valoare: | Returnează hash MD5 calculat pe un succes, sau FALSE în caz de eșec |
|---|---|
| Versiune PHP: | 4+ |
| Changelog: | Parametrul brut a devenit opțional în PHP 5.0 |
Mai multe exemple
Exemplul 1
Imprimarea rezultatelor 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>";
?> Run exemplu » Exemplul 2
Imprimarea rezultatelor md5() și apoi testați - l:
<?php
$str = "Hello";
echo md5($str);
if (md5($str) ==
"8b1a9953c4611296a827abf8c47804d7")
{
echo "<br>Hello
world!";
exit;
}
?> Run exemplu » <PHP String Reference