ALL :: ZONES :: Global and rdbms: is it limitation of php? |
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By: PHP newbee  |
Date: 20/04/2003 00:00:00  |
Points: 50 | Status: Answered Quality : Excellent |
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Hi Experts, i have noticed tht declaring a global variable in php is hard comparing with other tools. Is this a limitation in php? Further, there is no rdbms in php(hope i am right!?!?) can i have a forign key w/o this relation? huv it is possible? pls explain... |
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| By: VGR | Date: 20/04/2003 16:45:00 | |
Type : Answer |
| 1) wrong 2) wrong Happy ? :D ----- global variable : <?php $toto=1; echo "$toto is a global variable "; include('someinclude.inc.php'); // $toto is accessible directly in that include ?> The ***only*** place where globals are not-really-globals (and this annopys me at the uttermost level of exasperation since the beginning) is if functions are declared in the global scope. so a function in the file above wanting to access globall variable $toto would have to be declared like this : function foofunc($par) { GLOBAL $toto; echo "toto is know as value '$toto' here also "; } // foofunc procedure Please note also that nowadays people begin to use syntax $GLOBALS[]-something or $_SERVER[]-like ; see documentation at <A HREF="http://www.php.net">www.php.net</a>, type in "globals" -------- no RDBMS in PHP Sure : PHP supports natively (not via OCI or ODBC or OleDB :D :D :D) dBase dbm dbx DB++ FilePro Informix Interbase Ingres II mSql MySql Oracle PostGreSql Sybase ------- foreign keys, even in MySql 3.23.44+ (InnoDB tables) : <A HREF="http://www.mysql.com/doc/en/ANSI_diff_Foreign_Keys.html">http://www.mysql.com/doc/en/ANSI_diff_Foreign_Keys.html</a> |
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| By: bljak | Date: 21/04/2003 20:36:00 | |
Type : Comment |
| msSql also ... :) //bljak |
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| By: VGR | Date: 21/04/2003 21:33:00 | |
Type : Comment |
| yes yes, sure, but I only dare to write about things I know ;-) |
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