aprende PHP leccion 5
Tipos de variables PHP
Tipos de variables PHP
$ y son sensibles a mayúsculas y minúsculas
(no así las palabras claves del lenguaje).En el lenguaje
PHP no es necesario definir el tipo de variable antes de utilizarla, las mismas se crean en el momento de emplearlas.
Las variables se declaran cuando se le asigna un valor, por ejemplo:$dia = 24; //Se declara una variable de tipo integer.
$sueldo = 758.43; //Se declara una variable de tipo double.
$nombre = "juan"; //Se declara una variable de tipo string.
$exite = true; //Se declara una variable boolean.
También podemos hacer notar que para disponer comentarios de línea debemos utilizar dos caracteres //
echo.
Un programa terminado que inicializa y muestra el contenido de cuatro variables de distinto tipo es:<html>
<head>
<title>Problema </title >
</head>
<body>
<?php
$dia =24; //Se declara una variable de tipo integer.
$sueldo =758.43; //Se declara una variable de tipo double.
$nombre ="juan"; //Se declara una variable de tipo string.
$exite =true; //Se declara una variable boolean.
echo "Variable entera:";
echo $dia;
echo"<br>";
echo"Variable double:";
echo$sueldo;
echo"<br>";
echo"Variable string:";
echo$nombre;
echo"<br>";
echo"Variable boolean:";
echo$exite;
?>
</body>
</html>
Notepad++ .
WampServer y editado el codigo anterior en nuestro Notepad++
y si todo nos quedo bien nos imprimira en pantalla el siguiente resultado en el navegador .
HTML.
Este proceso puede acortarse un poco pero para que sea más claro inicialmente tomaremos el camino largo de hacer la impresión de un dato con cada comando echo.
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great post, as usual!
thanks
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