{"id":1673,"date":"2014-03-02T21:01:40","date_gmt":"2014-03-03T05:01:40","guid":{"rendered":"http:\/\/www.virendrachandak.com\/techtalk\/\/?p=1673"},"modified":"2025-12-17T15:48:11","modified_gmt":"2025-12-17T23:48:11","slug":"using-php-create-passwords-for-htpasswd-file","status":"publish","type":"post","link":"https:\/\/www.virendrachandak.com\/techtalk\/using-php-create-passwords-for-htpasswd-file\/","title":{"rendered":"How to generate passwords for .htpasswd using PHP"},"content":{"rendered":"

In my earlier post about .htaccess I had described about authentication using .htaccess<\/a> and command to generate .htpasswd file. However, when we want to add passwords for many users that method will take too long, since we will have to add passwords for each user one at a time. However, there is an easier way to generate the .htpasswd file using PHP. In this post I will show the different algorithms which can be used to generate the .htpasswd file.
\n<\/p>\n

Method 1: Using crypt() function.<\/h3>\n

This uses method uses crypt() encryption for passwords. This used to be the default algorithm used by Apache (2.2.17 and older). The password generated by this method will not work on Windows systems as they use MD5 based passwords. This method is same as using the command :<\/p>\n

htpasswd -d \/usr\/local\/etc\/apache\/.htpasswd user1<\/pre>\n
The output of the code below can be directly added to the .htpasswd file.<\/p>\n
\r\n<?php\r\n\/\/ Password to be used for the user\r\n$username = 'user1';\r\n$password = 'password1';\r\n\r\n\/\/ Encrypt password\r\n$encrypted_password = crypt($password, base64_encode($password));\r\n\r\n\/\/ Print line to be added to .htpasswd file\r\necho $username . ':' . $encrypted_password;\r\n<\/pre>\n
Sample Output:<\/div>\n
user1:MzKS62M\/K9HSs<\/pre>\n
Method 2: Using APR1-MD5 algorithm<\/h3>\n
MD5 encryption method is more secure than the crypt method. This is the default method since Apache 2.2.18. The password generated by using this method can be used on both Windows and Linux based systems. This method is same as using the command :<\/p>\n
htpasswd -m \/usr\/local\/etc\/apache\/.htpasswd user1<\/pre>\n
Here is a script which I created based on the function I found on Stack Overflow<\/a>.<\/p>\n
\r\n<?php\r\n\/\/ APR1-MD5 encryption method (windows compatible)\r\nfunction crypt_apr1_md5($plainpasswd)\r\n{\r\n$salt = substr(str_shuffle("abcdefghijklmnopqrstuvwxyz0123456789"), 0, 8);\r\n$len = strlen($plainpasswd);\r\n$text = $plainpasswd.'$apr1$'.$salt;\r\n$bin = pack("H32", md5($plainpasswd.$salt.$plainpasswd));\r\nfor($i = $len; $i > 0; $i -= 16) { $text .= substr($bin, 0, min(16, $i)); }\r\n\/\/ for PHP version < 8\r\n\/\/ for($i = $len; $i > 0; $i >>= 1) { $text .= ($i & 1) ? chr(0) : $plainpasswd{0}; }\r\n\/\/ for PHP 8+\r\nfor($i = $len; $i > 0; $i >>= 1) { $text .= ($i & 1) ? chr(0) : $plainpasswd[0]; }\r\n$bin = pack("H32", md5($text));\r\nfor($i = 0; $i < 1000; $i++)\r\n{\r\n$new = ($i & 1) ? $plainpasswd : $bin;\r\nif ($i % 3) $new .= $salt;\r\nif ($i % 7) $new .= $plainpasswd;\r\n$new .= ($i & 1) ? $bin : $plainpasswd;\r\n$bin = pack("H32", md5($new));\r\n}\r\nfor ($i = 0; $i < 5; $i++)\r\n{\r\n$k = $i + 6;\r\n$j = $i + 12;\r\nif ($j == 16) $j = 5;\r\n$tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;\r\n}\r\n$tmp = chr(0).chr(0).$bin[11].$tmp;\r\n$tmp = strtr(strrev(substr(base64_encode($tmp), 2)),\r\n"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+\/",\r\n".\/0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");\r\n\r\nreturn "$"."apr1"."$".$salt."$".$tmp;\r\n}\r\n\r\n\/\/ Password to be used for the user\r\n$username = 'user1';\r\n$password = 'password1';\r\n\r\n\/\/ Encrypt password\r\n$encrypted_password = crypt_apr1_md5($password);\r\n\r\n\/\/ Print line to be added to .htpasswd file\r\necho $username . ':' . $encrypted_password;\r\n<\/pre>\n
Sample Output:<\/div>\n
user1:$apr1$e5cytbnu$ps.bh8zF0tkJpEgkGtYcf0<\/pre>\n
We can use either of the above methods, however, the preferred method is to use the MD5 algorithm, since it is more secure and also works on both Windows and Linux systems.<\/div>\n
Using any of the above methods and a loop we can easily generate the passwords for many users. We can use loop similar to the following to generate the passwords to be added to the .htpasswd file.<\/p>\n
\n
\n
\n
\r\n\/\/ Array for usernames and password.\r\n$users = array();\r\n\/\/ User 1\r\n$users[0]['username'] = 'user1';\r\n$users[0]['password'] = 'password1';\r\n\/\/ User 2\r\n$users[1]['username'] = 'user2';\r\n$users[1]['password'] = 'password2';\r\n\/\/ User 3\r\n$users[2]['username'] = 'user3';\r\n$users[2]['password'] = 'password3';\r\n\r\nforeach($users as $user => $data)\r\n{\r\n$username = $data['username'];\r\n$password = $data['password'];\r\n\/\/ Encrypt password\r\n$encryptedpwd = crypt_apr1_md5($password);\r\n\r\n\/\/ Print line to be added to .htpasswd file\r\n$content = $username . ':' . $encryptedpwd;\r\necho $content . '<br \/>';\r\n}\r\n<\/pre>\n
Sample Output:<\/div>\n
user1:$apr1$9qrj2x80$p2L32fS0tO7JgwzUISW8b.\r\nuser2:$apr1$hmay01vn$uIHCNVBgF5qH5jmNBIzw4\/\r\nuser3:$apr1$v2tohm9c$3TtZAPuaD4dhPF62kPOwO\/<\/pre>\n
By using PHP we can easily generate the code to be added to .htpasswd file for many users very easily. All the usernames and passwords in my examples are just sample users. Make use the username that you want and a different, more secure, password.<\/p>\n<\/div>\n
 View Demo<\/a><\/div>\n
<\/a><\/div>\n<\/div>\n
Update<\/strong>: Newer versions of Apache can use BCRPYT for password hash so here is another posts about Generating bcrypt .htpasswd passwords using PHP<\/a>.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
In my earlier post about .htaccess I had described about authentication using .htaccess and command to generate .htpasswd file. However, when we want to add passwords for many users that method will take too long, since we will have to add passwords for each user one at a time. However, there is an easier way […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"How to generate password for .htpasswd using PHP","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[131,6,8],"tags":[15,16,20,28],"class_list":["post-1673","post","type-post","status-publish","format-standard","hentry","category-security","category-server-configuration","category-web-development","tag-htaccess","tag-htpasswd","tag-apache","tag-configuration-file"],"yoast_head":"\nHow to generate passwords for .htpasswd using PHP - Virendra's TechTalk<\/title>\n<meta name=\"description\" content=\"This post describes different methods to generate .htpasswd file using crypt and MD5 methods. 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However, now there is a more secure BCRYPT algorithm that can be used since apache 2.4 for passwords in .htpasswd. In this post we will generate .htpasswd file using the BCRYPT algorithm\u2026","rel":"","context":"In "Security"","block_context":{"text":"Security","link":"https:\/\/www.virendrachandak.com\/techtalk\/category\/security\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":224,"url":"https:\/\/www.virendrachandak.com\/techtalk\/htaccess-tips\/","url_meta":{"origin":1673,"position":1},"title":".htaccess tips","author":"Virendra Chandak","date":"October 2, 2011","format":false,"excerpt":"Topics Covered: What is .htaccess file? When to use .htaccess file? Disadvantage of using .htaccess file Authentication using .htaccess file Custom Error Document Allow\/Disallow Directory Listings What is .htaccess file? .htaccess file is used on Apache Web Server to make configuration changes on per-directory basis. 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So then I tried to add\u2026","rel":"","context":"In "PHP"","block_context":{"text":"PHP","link":"https:\/\/www.virendrachandak.com\/techtalk\/category\/php\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1714,"url":"https:\/\/www.virendrachandak.com\/techtalk\/php-5-5-password-hashing-api\/","url_meta":{"origin":1673,"position":3},"title":"PHP 5.5 Password Hashing API","author":"Virendra Chandak","date":"June 1, 2014","format":false,"excerpt":"Most of the applications or websites today have a user registration system which requires storing usernames, passwords etc. A developer of the application should always store passwords securely and never in plain text. 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