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3241. Instruction separation
. PHP Manual . Prev . Chapter 5. Basic syntax . Next . Instructions are separated the same as in C or Perl - terminate each statement with a semicolon. The closing tag (?>) also implies the end of the statement, so the following are equivalent: . <?php echo "This is a test"; ?> <?php echo "This is a test" ?> . Prev . Home . Next . Basic syntax . Up . Comments
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Ссылки http://oit.cmc.msu.ru/php/language.basic-syntax.instruction-separation.html -- 3.5 Кб -- 03.02.2002
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3242. Getting Started
. PHP Manual . Prev . Next . Table of Contents . 1. Introduction . 2. Installation . 3. Configuration . 4. Security . Prev . Home . Next . Preface . Introduction
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Ссылки http://oit.cmc.msu.ru/php/getting-started.html -- 3.0 Кб -- 03.02.2002
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3243. Keeping Current
PHP Manual . Prev . ... Security . ... PHP, like any other large system, is under constant scrutiny and improvement. Each new version will often include both major and minor changes to enhance and repair security flaws, configuration mishaps, and other issues that will affect the overall security and stability of your system. Like other system-level scripting languages and programs, the best approach is to update often, and maintain awareness of the latest versions and their changes. ...
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Ссылки http://oit.cmc.msu.ru/php/security.current.html -- 3.3 Кб -- 03.02.2002
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3244. Error Reporting
PHP Manual . ... With PHP security, there are two sides to error reporting. ... For example, if an attacker had gleaned information about a page based on a prior form submission, they may attempt to override variables, or modify them: . ... For example, the very style of a generic PHP error indicates a system is running PHP. ... One way of catching this issue ahead of time is to make use of PHP's own error_reporting() , to help you secure your code and find variable usage that may be dangerous. ...
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Ссылки http://oit.cmc.msu.ru/php/security.errors.html -- 8.6 Кб -- 03.02.2002
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3245. Hiding PHP
PHP Manual . ... Make PHP code look like other code types AddType application/x-httpd-php .asp .py .pl Or obscure it completely: . ... Make PHP code look like unknown types AddType application/x-httpd-php .bop .foo .133t Or hide it as html code, which has a slight performance hit because all html will be parsed through the PHP engine: . ... Make all PHP code look like html AddType application/x-httpd-php .htm .html For this to work effectively, you must rename your PHP files with the above extensions. ...
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Ссылки http://oit.cmc.msu.ru/php/security.hiding.html -- 5.2 Кб -- 03.02.2002
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3246. Security
PHP Manual . ... PHP is designed specifically to be a more secure language for writing CGI programs than Perl or C, and with correct selection of compile-time and runtime configuration options, and proper coding practices, it can give you exactly the combination of freedom and security you need. ... A large selection of options guarantees you can use PHP for a lot of purposes, but it also means there are combinations of these options and server configurations that result in an insecure setup. ...
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Ссылки http://oit.cmc.msu.ru/php/security.html -- 7.5 Кб -- 03.02.2002
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3247. Using Register Globals
... One feature of PHP that can be used to enhance security is configuring PHP with register_globals = off. ... They will have to take the additional time to forge submissions, and your internal variables are effectively isolated from user submitted data. ... php if ($username) { // can be forged by a user in get/post/cookies $good_login = 1; } if ($good_login == 1) { // can be forged by a user in get/post/cookies, fpassthru ("/highly/sensitive/data/index.html"); } ?> ... User Submitted Data ...
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Ссылки http://oit.cmc.msu.ru/php/security.registerglobals.html -- 6.0 Кб -- 03.02.2002
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3248. User Submitted Data
PHP Manual . ... The greatest weakness in many PHP programs is not inherent in the language itself, but merely an issue of code not being written with security in mind. ... php // remove a file from the user's home directory... or maybe // somebody else's? unlink ($evil_var); // Write logging of their access... or maybe an /etc/password entry? fputs ($fp, $evil_var); // Execute something trivial.. or rm -rf *? system ($evil_var); exec ($evil_var); ?> ... Can this script be used in unintended ways? ...
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Ссылки http://oit.cmc.msu.ru/php/security.variables.html -- 5.2 Кб -- 03.02.2002
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3249. Database Security
... Security . ... See how an attacker can tamper with an SQL query . ... Applications should never connect to the database as its owner or a superuser, because these users can execute any query at will, for example, modifying the schema (e.g. dropping tables) or deleting its entire content. ... The well-known example for the hashing is storing the MD5 hash of a password in a database, instead of the password itself. ... Example 4-5. ... SQL UPDATEs are also subject to attacking your database. ...
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Ссылки http://oit.cmc.msu.ru/php/security.database.html -- 21.9 Кб -- 03.02.2002
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3250. Installed as an Apache module
PHP Manual . ... When PHP is used as an Apache module it inherits Apache's user permissions (typically those of the "nobody" user). ... For example, if you are using PHP to access a database, unless that database has built-in access control, you will have to make the database accessable to the "nobody" user. ... You can protect against this with Apache authorization, or you can design your own access model using LDAP, .htaccess files, etc. and include that code as part of your PHP scripts. ...
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Ссылки http://oit.cmc.msu.ru/php/security.apache.html -- 4.9 Кб -- 03.02.2002
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3251. Installed as CGI binary
... Using PHP as a CGI binary is an option for setups that for some reason do not wish to integrate PHP as a module into server software (like Apache), or will use PHP with different kinds of CGI wrappers to create safe chroot and setuid environments for scripts. This setup usually involves installing executable PHP binary to the web server cgi-bin directory. ... Accessing system files: http://my.host/cgi-bin/php?/etc/passwd . ... Action php-script /cgi-bin/php AddHandler php-script .php . ...
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Ссылки http://oit.cmc.msu.ru/php/security.cgi-bin.html -- 12.5 Кб -- 03.02.2002
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3252. Filesystem Security
PHP Manual . ... Security . ... PHP is subject to the security built into most server systems with respect to permissions on a file and directory basis. This allows you to control which files in the filesystem may be read. ... Poor variable checking leads to.... <?php // remove a file from the user's home directory $username = $HTTP_POST_VARS['user_submitted_name']; $homedir = "/home/$username"; $file_to_delete = "$userfile"; unlink ($homedir/$userfile); echo "$file_to_delete has been deleted!" ...
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Ссылки http://oit.cmc.msu.ru/php/security.filesystem.html -- 8.0 Кб -- 03.02.2002
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3253. Configuration
PHP Manual . ... The configuration file . ... any text on a line after an unquoted semicolon (;) is ignored [php] ; section markers (text within square brackets) are also ignored ; Boolean values can be set to either: ; true, on, yes ; or false, off, no, none register_globals = off magic_quotes_gpc = yes ; you can enclose strings in double-quotes include_path = ".:/usr/local/lib/php" ; backslashes are treated the same as any other character include_path = ".;c:\php\lib" . ... ifx.default_user string . ...
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Ссылки http://oit.cmc.msu.ru/php/configuration.html -- 53.0 Кб -- 03.02.2002
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3254. Complete list of configure options
... The following is a complete list of options supported by PHP 4 configure scripts (as of 4.1.0), used when compiling in Unix-like environments. ... Include old xDBM support (deprecated). --enable-dba=shared . ... DIR is the FrontBase base directory. --enable-filepro . ... DIR is the Informix base install directory, defaults to nothing. --with-ingres[=DIR] . ... DIR is the InterBase base install directory, defaults to /usr/interbase. --with-msql[=DIR] . ... Include GD support (DIR is GD's install dir)...
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Ссылки http://oit.cmc.msu.ru/php/install.configure.html -- 42.8 Кб -- 03.02.2002
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3255. Servers-Other web servers
. PHP Manual . Prev . Chapter 2. Installation . Next . PHP can be built to support a large number of web servers. Please see Server-related options for a full list of server-related configure options. The PHP CGI binaries are compatible with almost all webservers supporting the CGI standard. Prev . Home . Next . Servers-Xitami . Up . Problems?
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Ссылки http://oit.cmc.msu.ru/php/install.otherhttpd.html -- 3.2 Кб -- 03.02.2002
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3256. Problems?
PHP Manual . ... If you are still stuck, someone on the PHP installation mailing list may be able to help you. ... If you want to get help on the mailing list, please try to be precise and give the necessary details about your environment (which operating system, what PHP version, what web server, if you are running PHP as CGI or a server module, etc.), and preferably enough code to make others able to reproduce and test your problem. If you think you have found a bug in PHP, please report it. ...
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Ссылки http://oit.cmc.msu.ru/php/install.problems.html -- 5.0 Кб -- 03.02.2002
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3257. Installation
... Unix/HP-UX installs . ... Servers-CGI/Commandline . ... Servers-Other web servers . ... Command line scripting . ... If PHP has no module support for your web server, you can always use it as a CGI processor. This means you set up your server to use the command line executable of PHP ( php.exe on Windows) to process all PHP file requests on the server. ... From now on, this section deals with setting up PHP for web servers on Unix and Windows with server module interfaces and CGI executables. ...
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Ссылки http://oit.cmc.msu.ru/php/installation.html -- 7.6 Кб -- 03.02.2002
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3258. Servers-Netscape and iPlanet
... This section contains notes and hints specific to Netscape and iPlanet installs of PHP, both for Sun Solaris and Windows versions. You can find more information about setting up PHP for the Netscape Enterprise Server here: http://benoit.noss.free.fr/php/install-php4.html . ... To Install PHP as CGI (for Netscape Enterprise Server, iPlanet, perhaps Fastrack), do the following: . ... To Install PHP as NSAPI (for Netscape Enterprise Server, iPlanet, perhaps Fastrack, do the following: . ...
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Ссылки http://oit.cmc.msu.ru/php/install.netscape-enterprise.html -- 12.8 Кб -- 03.02.2002
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3259. Servers-OmniHTTPd Server
... You need to complete the folowing steps to make PHP work with OmniHTTPd. ... SAPI is supported by OmniHTTPd, but some tests showed, that it is not so stable to use PHP as an ISAPI module in OmniHTTPd. Step 1: Install OmniHTTPd server. Step 2: Right click on the blue OmniHTTPd icon in the system tray and select Properties . Step 3: Click on Web Server Global Settings . ... actual = c:\path-to-php-dir\php.exe , and use the Add button. ... actual = .php , and use the Add button. ...
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Ссылки http://oit.cmc.msu.ru/php/install.omnihttpd.html -- 5.0 Кб -- 03.02.2002
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3260. Servers-Oreilly Website Pro
PHP Manual . ... This section contains notes and hints specific to Oreilly Website Pro. This list describes how to set up the PHP CGI binary or the ISAPI module to work with Oreilly Website Pro on Windows. ... From the List select "Associations" and enter the desired extension ( .php ) and the path to the CGI exe (ex. c:\php\php.exe ) or the ISAPI DLL file (ex. c:\php\sapi\php4isapi.dll ). Select "Content Types" add the same extension ( .php ) and enter the content type. ...
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Ссылки http://oit.cmc.msu.ru/php/install.oreilly.html -- 4.1 Кб -- 03.02.2002
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