USER_100 Template Data
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Root Category
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-- General Information
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-- Obtaining PHP
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-- Migrating PHP
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---- Migrating from PHP 2 to PHP 3
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---- Migrating from PHP 3 to PHP 4
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---- Migrating from PHP 4 to PHP 5
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-- Database issues
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-- PHP and its friends
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---- PHP and HTML
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---- PHP and COM
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Generally it is, but as PHP is mostly used as a web scripting language it runs in the web servers context, thus visual objects will never appear on the servers desktop. If you use PHP for application scripting e.g. in conjunction with PHP-GTK there is no limitation in accessing and manipulating visual objects through COM.
Is it possible manipulate visual objects in PHP ?
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There are dozens of VARIANT types and combinations of them. Most of them are already supported but a few still have to be implemented. Arrays are not completely supported. Only single dimensional indexed only arrays can be passed between PHP and COM. If you find other types that aren't supported, please report them as a bug (if not already reported) and provide as much information as available.
What does 'Unsupported variant type: xxxx (0xxxxx)' mean ?
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If this is a simple DLL there is no way yet to run it from PHP. If the DLL contains a COM server you may be able to access it if it implements the IDispatch interface.
I have built a DLL to calculate something. Is there any way to run this DLL under PHP ?
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Since Javascript is (usually) a client-side technology, and PHP is (usually) a server-side technology, and since HTTP is a "stateless" protocol, the two languages cannot directly share variables. It is, however, possible to pass variables between the two. One way of accomplishing this is to generate Javascript code with PHP, and have the browser refresh itself, passing specific variables back to the PHP script. The example below shows precisely how to do this -- it allows PHP code to capture screen height and width, something that is normally only possible on the client side.
How can I pass a variable from Javascript to PHP?
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Yes. You already have all the tools you need if you are running entirely under Windows 9x/Me, or NT/2000, where you can use ODBC and Microsoft's ODBC drivers for Microsoft Access databases. If you are running PHP on a Unix box and want to talk to MS Access on a Windows box you will need Unix ODBC drivers. » OpenLink Software has Unix-based ODBC drivers that can do this. Another alternative is to use an SQL server that has Windows ODBC drivers and use that to store the data, which you can then access from Microsoft Access (using ODBC) and PHP (using the built in drivers), or to use an intermediary file format that Access and PHP both understand, such as flat files or dBase databases. On this point Tim Hayes from OpenLink software writes: Using another database as an intermediary is not a good idea, when you can use ODBC from PHP straight to your database - i.e. with OpenLink's drivers. If you do need to use an intermediary file format, OpenLink have now released Virtuoso (a virtual database engine) for NT, Linux and other Unix platforms. Please visit our » website for a free download. One option that has proved successful is to use MySQL and its MyODBC drivers on Windows and synchronizing the databases. Steve Lawrence writes: * Install MySQL on your platform according to instructions with MySQL. Latest available from » http://www.mysql.com/ No special configuration required except when you set up a database, and configure the user account, you should put % in the host field, or the host name of the Windows computer you wish to access MySQL with. Make a note of your server name, username, and password. * Download the MyODBC for Windows driver from the MySQL site. Install it on your Windows machine. You can test the operation with the utilities included with this program. * Create a user or system dsn in your ODBC administrator, located in the control panel. Make up a dsn name, enter your hostname, user name, password, port, etc for you MySQL database configured in step 1. * Install Access with a full install, this makes sure you get the proper add-ins... at the least you will need ODBC support and the linked table manager. * Now the fun part! Create a new access database. In the table window right click and select Link Tables, or under the file menu option, select Get External Data and then Link Tables. When the file browser box comes up, select files of type: ODBC. Select System dsn and the name of your dsn created in step 3. Select the table to link, press OK, and presto! You can now open the table and add/delete/edit data on your MySQL server! You can also build queries, import/export tables to MySQL, build forms and reports, etc. Tips and Tricks: * You can construct your tables in Access and export them to MySQL, then link them back in. That makes table creation quick. * When creating tables in Access, you must have a primary key defined in order to have write access to the table in access. Make sure you create a primary key in MySQL before linking in access * If you change a table in MySQL, you have to re-link it in Access. Go to tools>add-ins>linked table manager, cruise to your ODBC DSN, and select the table to re-link from there. you can also move your dsn source around there, just hit the always prompt for new location checkbox before pressing OK.
Can I access Microsoft Access databases?
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On Windows machines, you can simply use the included ODBC support and the correct ODBC driver. On Unix machines, you can use the Sybase-CT driver to access Microsoft SQL Servers because they are (at least mostly) protocol-compatible. Sybase has made a » free version of the necessary libraries for Linux systems. For other Unix operating systems, you need to contact Sybase for the correct libraries. Also see the answer to the next question.
I heard it's possible to access Microsoft SQL Server from PHP. How?
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Few other changes exist, see the migration 5 appendix for details. There won't be a PHP 5 specific version of the manual as the bulk of PHP remains the same.
So besides the new OOP model, what else has changed in PHP 5? Also, is there a PHP 5 specific version of the PHP manual?
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The main change in PHP 5 is to the OOP model as PHP 5 now uses the Zend Engine 2.0. The zend.ze1_compatibility_mode directive enables compatability with the Zend Engine 1.0 (PHP 4). The new OOP model is documented in the OOP language reference and OOP migration appendix sections.
I hear PHP 5 has an entirely new OOP model, will my existing OOP code work? Where do I find information on these new OOP features?
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MySQL is supported with the only change being that MySQL support is no longer enabled by default in PHP 5. This essentially means that PHP doesn't include the --with-mysql option in the configure line so that you must now manually do this when compiling PHP. Windows users will edit php.ini and enable the php_mysql.dll DLL as in PHP 4 no such DLL existed, it was simply built into your Windows PHP binaries. Also, the MySQL client libraries are no longer bundled with PHP. More details on this topic are covered in the following FAQ and be sure to read the MySQL section for details on installing MySQL. An example configure line would be --with-mysql=/usr while Windows users will need the libmySQL.dll available to the system.
Does MySQL work in PHP 5? It seemed to have disappeared.
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Although PHP 5 offers many new features, it's designed to be as compatible with earlier versions of PHP as possible with little functionality being broken in the process. Be sure to read the appropriate PHP 5 migration appendix of this manual as it contains even more information on the topic of migrating to PHP 5.
Migrating from PHP 4 to PHP 5
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