{"id":4314,"date":"2020-10-30T22:35:57","date_gmt":"2020-10-30T21:35:57","guid":{"rendered":"https:\/\/webhosting.de\/?p=4314"},"modified":"2025-02-19T18:34:31","modified_gmt":"2025-02-19T17:34:31","slug":"php","status":"publish","type":"post","link":"https:\/\/webhosting.de\/es\/php\/","title":{"rendered":"PHP"},"content":{"rendered":"

PHP es la abreviatura de un lenguaje de scripting llamado Hypertext Preprocessor. La abreviatura PHP signific\u00f3 durante mucho tiempo Personal Home Page Tool, que es lo que era originalmente. El lenguaje de scripting o lenguaje de programaci\u00f3n se basa en la sintaxis de Perl y C. Estos programas son indispensables para la creaci\u00f3n de sitios y aplicaciones web din\u00e1micos. El preprocesador de hipertexto est\u00e1 disponible gratuitamente y se distribuye como software libre bajo la licencia PHP. PHP es indispensable por su amplio soporte de bases de datos, la integraci\u00f3n de protocolos de Internet y la disponibilidad de numerosas bibliotecas de funciones. El paquete de software tambi\u00e9n puede incluir Squid.<\/p>\n

\u00bfC\u00f3mo se distribuy\u00f3 y c\u00f3mo funciona PHP?<\/h3>\n

A principios de 2013, PHP se utilizaba en unos 244 millones de sitios web. El paquete de software tambi\u00e9n puede incluir Squid. En 2015, 82% de sitios web se reg\u00edan por este lenguaje de programaci\u00f3n. El preprocesador de hipertexto es el lenguaje de programaci\u00f3n m\u00e1s utilizado en el mundo porque es f\u00e1cil de aprender y sin complicaciones. El programa permite crear sitios web y, adem\u00e1s, suele estar ya instalado por los proveedores de alojamiento web. Con el sistema PHP, los c\u00f3digos pueden trabajar en el lado del servidor. Esto significa que el c\u00f3digo fuente no puede enviarse a un navegador web. Este c\u00f3digo fuente se env\u00eda a un int\u00e9rprete desde el servidor web. El int\u00e9rprete comprueba el c\u00f3digo fuente y luego env\u00eda la salida al navegador. Esta salida del int\u00e9rprete PHP tambi\u00e9n aparecer\u00e1 al final. El int\u00e9rprete env\u00eda un documento HTML al navegador, que puede ser generado con PHP con otros archivos como im\u00e1genes y archivos PDF. El sistema que ejecuta aplicaciones web con un archivo PHP es \"ajustes<\/a>urgente. El sistema debe ser capaz de manejar las instrucciones contenidas en el archivo. Una interfaz (por ejemplo, ISAPI o CGI) ayuda al int\u00e9rprete a ejecutar un demonio de servidor u otros servicios de servidor (por ejemplo, Apache o IIS). En sistemas operativos como Linux, Windows y macOS, un servidor web como Apache y PHP se denomina LAMP para Linux. Para Windows, el paquete se llama WAMP y para macOS se llama MAMP. El proyecto XAMPP est\u00e1 desarrollando paquetes que neutralizan los paquetes de Internet. Sin embargo, estas versiones s\u00f3lo pueden utilizarse para entornos de prueba. En realidad, el Preprocesador de Hipertexto s\u00f3lo se ejecuta en un entorno de servidor web, por lo que PHP tambi\u00e9n est\u00e1 sujeto a HTTP. Cada p\u00e1gina PHP llamada contribuye a la carga del servidor web. El int\u00e9rprete tambi\u00e9n trabaja con el c\u00f3digo fuente. Esto aumenta la carga y reduce la velocidad de respuesta. Para mejorar la velocidad de respuesta se dispone de varias cach\u00e9s de bytecode. Las cach\u00e9s est\u00e1n disponibles para almacenar temporalmente el programa y acelerar el acceso la pr\u00f3xima vez que se llame al archivo. El programa PHP puede utilizarse para escribir scripts orientados a la l\u00ednea de comandos. \u00c9stos tambi\u00e9n son independientes de los internos. Otro software libre con el c\u00f3digo PHP se llama Hip-Hop desde 2010. Fue desarrollado tras varios a\u00f1os de investigaci\u00f3n por Facebook<\/a> se desarroll\u00f3 para aliviar la carga del 40% de los servidores de Facebook.<\/p>\n

Sesiones con el programa PHP<\/h3>\n

S\u00f3lo las variables ordinarias est\u00e1n disponibles dentro de una petici\u00f3n HTTP. Y s\u00f3lo los archivos guardados. En el \u00e1mbito de la petici\u00f3n, despu\u00e9s de la petici\u00f3n de la p\u00e1gina, es decir, al final, la variable Datos<\/a>o tambi\u00e9n se borra la memoria. Si un usuario borra una sitio web<\/a> Esto suele implicar varias visitas a la p\u00e1gina. Las llamadas variables de sesi\u00f3n (\u00e1mbito de sesi\u00f3n) se utilizan para llenar un carrito de la compra en una tienda online. PHP almacena los datos a trav\u00e9s de las sesiones, que es una configuraci\u00f3n est\u00e1ndar (\u00e1mbito de aplicaci\u00f3n). \u00c9stos se almacenan en el servidor de otras formas para que el contenido de la cesta de la compra virtual no se pierda con cada nueva p\u00e1gina a la que se accede.<\/p>","protected":false},"excerpt":{"rendered":"

PHP ist die Abk\u00fcrzung f\u00fcr eine Skriptsprache namens Hypertext Preprocessor. Diese Abk\u00fcrzung PHP stand lange f\u00fcr Personal Home Page Tool, diese ist urspr\u00fcnglich so gewesen. Die Skriptsprache oder auch Programmiersprache ist Syntax angelehnt an Perl und C. Diese Programme sind f\u00fcr die Erstellung von dynamischen Webseiten und Webanwendungen unverzichtbar. Der Hypertext Preprocessor ist hierbei als 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