md5_file()
PHP md5_file() funksiyasi
❮ PHP string funksiyalari ma’lumotnomasi
Misol
"test.txt" matn faylining MD5 xeshini hisoblang:
<?php
$filename = "test.txt";
$md5file = md5_file($filename);
echo $md5file;
?>
Yuqoridagi kodning natijasi quyidagicha bo‘ladi:
d41d8cd98f00b204e9800998ecf8427e
Ta’rif va qo‘llanilishi
md5_file() funksiyasi faylning MD5 xeshini hisoblaydi.
md5_file() funksiyasi RSA Data Security, Inc. kompaniyasining MD5 Message-Digest algoritmidan foydalanadi.
RFC 1321 - The MD5 Message-Digest Algorithm hujjatidan: "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."
Stringning MD5 xeshini hisoblash uchun md5() funksiyasidan foydalaning.
Sintaksis
md5_file(file,raw)
Parametr qiymatlari
| Parametr | Tavsif |
|---|---|
| file | Majburiy. Xeshi hisoblanadigan fayl |
| raw | Ixtiyoriy. Natijaning hex yoki binar formatini belgilovchi boolean qiymat:
|
Texnik tafsilotlar
| Qaytariladigan qiymat: | Muvaffaqiyatli bo‘lsa hisoblangan MD5 xeshini, muvaffaqiyatsiz bo‘lsa FALSE qaytaradi |
|---|---|
| PHP versiyasi: | 4.2.0+ |
Ko‘proq misollar
Misol
"test.txt" faylining MD5 xeshini faylga saqlang:
<?php
$md5file = md5_file("test.txt");
file_put_contents("md5file.txt",$md5file);
?>
"test.txt" fayli o‘zgartirilganligini (ya’ni uning MD5 xeshi o‘zgarganligini) tekshiring:
<?php
$md5file = file_get_contents("md5file.txt");
if (md5_file("test.txt") == $md5file)
{
echo "The file is ok.";
}
else
{
echo "The file has been changed.";
}
?>
Yuqoridagi kodning natijasi quyidagicha bo‘lishi mumkin:
The file is ok.
❮ PHP string funksiyalari ma’lumotnomasi
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