Passage of variables by URL - Articulos PHP

Passage of variables by URL

PHP (Papers) | Date: 27/11/03

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We are going to see a very simple subject of the work with basic PHP but for any application Web, for which already conoceisthe work with variables passed through URL is possible q puts a littleto the day on this type of task.

The subject consists of acceding to a direction of the type pagina.php?variable1=valor1&variable2=valor2 and that interpreter PHP accedes to the values passed in the direction of the page to form the page that will be sent to the user.


<?
echo '<b>variable1:</b> ' $_POST["variable1"]; 
 I throw ' <br><b>variable2:</b> ' $_POST["variable2"]; 
 ?>


		
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For example, we are going to show a message in a page depending on a parameter passed through URL:

variables.php
`000 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015`	`<? if(isset($_GET["mensaje"])) switch ($_get["mensaje"]) { 0 marries: I throw ' Welcome to my web'; break; 1 marries: I throw ' Message 2 '; break; marry 2: I throw ' Last mensajé; break; default: I throw ' Error in parametró; } else I throw ' did not go parametró; ?>` `Maximizar Seleccionar PHP`

This I cosay, reads parametro call message, the way to do it is from $_get["mensaje"], asi as if parametro was another one (variables.php?mensaje=1&usuario=343) accederiamos to from $_get["usuario"].

From ahi, we watched if this defined the variable to see if this last one with the function isset, soon we make a cycle switch in order to show to an u another message according to the value of the last variable.

The example, will show a different message to us depending on if message it is worth 0, it is worth 1, it is worth 2, it has another value or not this defined.

Note: We must observe that according to which parametros we pass through URL some finders how google, did not add our URL, for example,google does not index pages with the variable you go.

Comentarios

vagoybostero

09/09/09 Comentario 1331

Muchas gracias por tomarte el tiempo de explicarle a los que no sabemos!!

Es muy buena la explicacion!!

kodem

04/04/11 Comentario 1684

y todos estos años preguntandome para que esas asignaciones en la barra de direccion...¬¬

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