{"id":6054,"date":"2013-08-08T21:22:28","date_gmt":"2013-08-08T21:22:28","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=6054"},"modified":"2019-05-08T10:44:15","modified_gmt":"2019-05-08T10:44:15","slug":"ejecutar-una-funcion-cada-x-segundos-con-jquery","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/ejecutar-una-funcion-cada-x-segundos-con-jquery\/","title":{"rendered":"Ejecutar una funci\u00f3n cada x segundos con jQuery"},"content":{"rendered":"<p>Modificar el contenido por <strong>intervalos de tiempo<\/strong> (setInterval) puede ser una funci\u00f3n importante para seg\u00fan que tipo de p\u00e1ginas Webs como por ejemplo para mostrar un reloj, o cualquier informaci\u00f3n que pueda cambiar en cuesti\u00f3n de segundos y no sea necesario recargar la p\u00e1gina para refrescar los cambios.<\/p>\n<p><strong>JavaScript<\/strong> dispone en su librer\u00eda de funciones la funci\u00f3n <em>setInterval()\u00a0<\/em>que permite justamente ejecutar una funci\u00f3n o evaluar una expresi\u00f3n a intervalos espec\u00edficos (en mili-segundos).<\/p>\n<p>El m\u00e9todo setInterval() se ejecutar\u00e1 en bucle hasta que se llame a la funci\u00f3n <em>clearInterval()<\/em> o se cierre la ventana del navegador. La funci\u00f3n<em> setTimeout()<\/em> puede resultar interesante tambi\u00e9n.<\/p>\n<p>En este art\u00edculo vamos a ver 2 ejemplos de como <strong>ejecutar una funci\u00f3n cada x segundos con jQuery<\/strong>. En el primer ejemplo, veremos como cambiar el color de fondo de una p\u00e1gina y el color del texto cada 3 segundos y, en el segundo veremos como ejecutar un archivo <strong>PHP<\/strong> mediante la t\u00e9cnica <strong>AJAX<\/strong>.<\/p>\n<p><strong>Cambiar el color de fondo y el color del texto de una p\u00e1gina Web cada 3 segundos<\/strong><\/p>\n<p>En el ejemplo vamos a tener el siguiente c\u00f3digo HTML:<\/p>\n<div id=\"wpshdo_1\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_1\" class=\"wp-synhighlighter-expanded\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_1\"><\/a><a id=\"wpshat_1\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_1\"  onClick=\"javascript:wpsh_toggleBlock(1)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_1\" onClick=\"javascript:wpsh_code(1)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_1\" onClick=\"javascript:wpsh_print(1)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_1\" class=\"wp-synhighlighter-inner\" style=\"display: block;\"><pre class=\"html4strict\" style=\"font-family:monospace;\"><span class=\"sc2\">&lt;<a href=\"http:\/\/december.com\/html\/4\/element\/body.html\"><span class=\"kw2\">body<\/span><\/a> <span class=\"kw3\">class<\/span><span class=\"sy0\">=<\/span><span class=\"st0\">&quot;white&quot;<\/span>&gt;<\/span>\n\u00a0\u00a0 \u00a0<span class=\"sc2\">&lt;<a href=\"http:\/\/december.com\/html\/4\/element\/h1.html\"><span class=\"kw2\">h1<\/span><\/a> <span class=\"kw3\">class<\/span><span class=\"sy0\">=<\/span><span class=\"st0\">&quot;black&quot;<\/span>&gt;<\/span>Cada 3 segundos se va a cambiar de color el fondo de esta Web.<span class=\"sc2\">&lt;<span class=\"sy0\">\/<\/span><a href=\"http:\/\/december.com\/html\/4\/element\/h1.html\"><span class=\"kw2\">h1<\/span><\/a>&gt;<\/span>\n<span class=\"sc2\">&lt;<span class=\"sy0\">\/<\/span><a href=\"http:\/\/december.com\/html\/4\/element\/body.html\"><span class=\"kw2\">body<\/span><\/a>&gt;<\/span><\/pre><\/div><\/div>\n<p>F\u00edjate que el tab &lt;body&gt; tiene un class=\u00bbwhite\u00bb y el tag &lt;h1&gt; tiene un class=\u00bbblack\u00bb.<\/p>\n<p>Como su nombre indican tendremos en nuestra hoja de estilos 2 clases representando el color negro y blanco:<\/p>\n<div id=\"wpshdo_2\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_2\" class=\"wp-synhighlighter-expanded\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_2\"><\/a><a id=\"wpshat_2\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_2\"  onClick=\"javascript:wpsh_toggleBlock(2)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_2\" onClick=\"javascript:wpsh_code(2)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_2\" onClick=\"javascript:wpsh_print(2)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_2\" class=\"wp-synhighlighter-inner\" style=\"display: block;\"><pre class=\"css\" style=\"font-family:monospace;\">.<span class=\"kw2\">white<\/span> <span class=\"br0\">&#123;<\/span>\n    <span class=\"kw1\">background-color<\/span><span class=\"sy0\">:<\/span><span class=\"re0\">#FFFFFF<\/span><span class=\"sy0\">;<\/span>\n    <span class=\"kw1\">color<\/span><span class=\"sy0\">:<\/span><span class=\"re0\">#000000<\/span><span class=\"sy0\">;<\/span>\n<span class=\"br0\">&#125;<\/span>\n&nbsp;\n.<span class=\"kw1\">black<\/span> <span class=\"br0\">&#123;<\/span>\n    <span class=\"kw1\">background-color<\/span><span class=\"sy0\">:<\/span><span class=\"re0\">#000000<\/span><span class=\"sy0\">;<\/span>\n    <span class=\"kw1\">color<\/span><span class=\"sy0\">:<\/span><span class=\"re0\">#FFFFFF<\/span><span class=\"sy0\">;<\/span>\n<span class=\"br0\">&#125;<\/span><\/pre><\/div><\/div>\n<p>Y en la cabecera de la p\u00e1gina o dentro de la etiqueta &lt;head&gt; de la p\u00e1gina agregamos el c\u00f3digo <strong>JavaScript<\/strong> que realiza la acci\u00f3n:<\/p>\n<div id=\"wpshdo_3\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_3\" class=\"wp-synhighlighter-expanded\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_3\"><\/a><a id=\"wpshat_3\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_3\"  onClick=\"javascript:wpsh_toggleBlock(3)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_3\" onClick=\"javascript:wpsh_code(3)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_3\" onClick=\"javascript:wpsh_print(3)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_3\" class=\"wp-synhighlighter-inner\" style=\"display: block;\"><pre class=\"javascript\" style=\"font-family:monospace;\">&lt;script src=&quot;https:\/\/code.jquery.com\/jquery-3.2.1.js&quot;&gt;&lt;\/script&gt;\n<span class=\"sy0\">&lt;<\/span>script type<span class=\"sy0\">=<\/span><span class=\"st0\">&quot;text\/javascript&quot;<\/span><span class=\"sy0\">&gt;<\/span>\n$<span class=\"br0\">&#40;<\/span>document<span class=\"br0\">&#41;<\/span>.<span class=\"me1\">ready<\/span><span class=\"br0\">&#40;<\/span><span class=\"kw2\">function<\/span><span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\t\n    <span class=\"kw2\">function<\/span> changeColor<span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\n        <span class=\"kw1\">if<\/span> <span class=\"br0\">&#40;<\/span>$<span class=\"br0\">&#40;<\/span><span class=\"st0\">'body'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">hasClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'white'<\/span><span class=\"br0\">&#41;<\/span><span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'body'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">removeClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'white'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'body'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">addClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'black'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'h1'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">removeClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'black'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'h1'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">addClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'white'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n        <span class=\"br0\">&#125;<\/span>\n        <span class=\"kw1\">else<\/span> <span class=\"br0\">&#123;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'body'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">removeClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'black'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'body'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">addClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'white'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'h1'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">removeClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'white'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'h1'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">addClass<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">'black'<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n        <span class=\"br0\">&#125;<\/span>\n    <span class=\"br0\">&#125;<\/span>\n    setInterval<span class=\"br0\">&#40;<\/span>changeColor<span class=\"sy0\">,<\/span> 3000<span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n<span class=\"br0\">&#125;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n<span class=\"sy0\">&lt;\/<\/span>script<span class=\"sy0\">&gt;<\/span><\/pre><\/div><\/div>\n<p>La funci\u00f3n principal o clave del asunto es la llamada a la funci\u00f3n <em>setInterval()<\/em> a la que le estamos pasando 2 par\u00e1metros; la funci\u00f3n a ejecutar y el tiempo de espera en mili-segundos para volver a ejecutar.<\/p>\n<p>En la funci\u00f3n <em>changeColor()<\/em>\u00a0que hemos creado lo \u00fanico que hacemos es quitar y a\u00f1adir los estilos correspondientes en el lugar deseado. En este caso, el color de fondo ir\u00e1 cambiando de color blanco a negro cada 3 segundos.<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-secondary\" href=\"https:\/\/www.jose-aguilar.com\/scripts\/jquery\/setinterval\/change-background.html\" target=\"_blank\" rel=\"noopener noreferrer\"><i class=\"fa fa-eye\"><\/i> Ver ejemplo cambiar de color cada 3 segundos<\/a><\/p>\n<p>Se podr\u00edan hacer todo tipo de funciones para ejecutar con la funci\u00f3n <em>setInterval()<\/em>.<\/p>\n<p>Tambi\u00e9n es posible ejecutar un archivo <strong>PHP<\/strong> cada x segundos empleando la tecnolog\u00eda <strong>AJAX<\/strong>.<\/p>\n<p><strong>Mostrar un n\u00famero aleatorio entre 0 y 100 cada 3 segundos empleando la tecnolog\u00eda AJAX<\/strong><\/p>\n<p>A\u00f1adiremos en el &lt;body&gt; un contenedor donde arrojaremos los resultados:<\/p>\n<pre>&lt;span id=\"value\"&gt;0&lt;\/span&gt;<\/pre>\n<p>En la cabecera de la p\u00e1gina o dentro de la etiqueta &lt;head&gt; agregamos el c\u00f3digo JavaScript que realiza la acci\u00f3n:<\/p>\n<div id=\"wpshdo_4\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_4\" class=\"wp-synhighlighter-expanded\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_4\"><\/a><a id=\"wpshat_4\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_4\"  onClick=\"javascript:wpsh_toggleBlock(4)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_4\" onClick=\"javascript:wpsh_code(4)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_4\" onClick=\"javascript:wpsh_print(4)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_4\" class=\"wp-synhighlighter-inner\" style=\"display: block;\"><pre class=\"javascript\" style=\"font-family:monospace;\">&lt;script src=&quot;https:\/\/code.jquery.com\/jquery-3.2.1.js&quot;&gt;&lt;\/script&gt;\n<span class=\"sy0\">&lt;<\/span>script type<span class=\"sy0\">=<\/span><span class=\"st0\">&quot;text\/javascript&quot;<\/span><span class=\"sy0\">&gt;<\/span>\n$<span class=\"br0\">&#40;<\/span>document<span class=\"br0\">&#41;<\/span>.<span class=\"me1\">ready<\/span><span class=\"br0\">&#40;<\/span><span class=\"kw2\">function<\/span><span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\n    <span class=\"kw2\">function<\/span> changeNumber<span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\n        value <span class=\"sy0\">=<\/span> $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'#value'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">text<\/span><span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n        $.<span class=\"me1\">ajax<\/span><span class=\"br0\">&#40;<\/span><span class=\"br0\">&#123;<\/span>\n            type<span class=\"sy0\">:<\/span> <span class=\"st0\">&quot;POST&quot;<\/span><span class=\"sy0\">,<\/span>\n            url<span class=\"sy0\">:<\/span> <span class=\"st0\">&quot;add.php&quot;<\/span><span class=\"sy0\">,<\/span>\n            success<span class=\"sy0\">:<\/span> <span class=\"kw2\">function<\/span><span class=\"br0\">&#40;<\/span>data<span class=\"br0\">&#41;<\/span> <span class=\"br0\">&#123;<\/span>\n                $<span class=\"br0\">&#40;<\/span><span class=\"st0\">'#value'<\/span><span class=\"br0\">&#41;<\/span>.<span class=\"me1\">text<\/span><span class=\"br0\">&#40;<\/span>data<span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n            <span class=\"br0\">&#125;<\/span>\n        <span class=\"br0\">&#125;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n    <span class=\"br0\">&#125;<\/span>\n    setInterval<span class=\"br0\">&#40;<\/span>changeNumber<span class=\"sy0\">,<\/span> 3000<span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n<span class=\"br0\">&#125;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n<span class=\"sy0\">&lt;\/<\/span>script<span class=\"sy0\">&gt;<\/span><\/pre><\/div><\/div>\n<p>Hemos creado la funci\u00f3n <em>changeNumber()<\/em> que lo que hace es ejecutar un AJAX que ejecuta el archivo <em>add.php<\/em> cada 3 segundos retornando un valor aleatorio entre 0 y 100.<\/p>\n<p>El archivo <em>add.php<\/em> contiene tan solo:<\/p>\n<div id=\"wpshdo_5\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_5\" class=\"wp-synhighlighter-expanded\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_5\"><\/a><a id=\"wpshat_5\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_5\"  onClick=\"javascript:wpsh_toggleBlock(5)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_5\" onClick=\"javascript:wpsh_code(5)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_5\" onClick=\"javascript:wpsh_print(5)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_5\" class=\"wp-synhighlighter-inner\" style=\"display: block;\"><pre class=\"php\" style=\"font-family:monospace;\"><span class=\"kw2\">&lt;?php<\/span>\n<span class=\"kw1\">echo<\/span> <a href=\"http:\/\/www.php.net\/rand\"><span class=\"kw3\">rand<\/span><\/a><span class=\"br0\">&#40;<\/span>0<span class=\"sy0\">,<\/span>100<span class=\"br0\">&#41;<\/span><span class=\"sy0\">;<\/span>\n<span class=\"sy1\">?&gt;<\/span><\/pre><\/div><\/div>\n<p>El ejemplo es muy sencillo pero ya nos da luz para realizar otro tipo de operaciones como guardar un valor en la base de datos, actualizar registros cada x segundos, escribir en un archivo, enviar un email, etc.<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-secondary\" href=\"https:\/\/www.jose-aguilar.com\/scripts\/jquery\/setinterval\/con-ajax.html\" target=\"_blank\" rel=\"noopener noreferrer\"><i class=\"fa fa-eye\"><\/i> Ver ejemplo AJAX<\/a><\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-primary\" href=\"https:\/\/www.jose-aguilar.com\/scripts\/jquery\/setinterval\/setinterval.zip\"><i class=\"fa fa-download\"><\/i> Descargar<\/a><\/p>\n<p style=\"text-align: center;\"><em>Esta entrada ha sido actualizada el 25\/10\/2018<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tutorial y c\u00f3digo de ejemplo que te permite averiguar como ejecutar una funci\u00f3n cada x segundos con jQuery usando la funci\u00f3n setInterval().<\/p>\n","protected":false},"author":1,"featured_media":7301,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,5],"tags":[65],"class_list":["post-6054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ajax","category-jquery","tag-countdown"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ejecutar una funci\u00f3n cada x segundos con jQuery - Jose Aguilar Blog<\/title>\n<meta name=\"description\" content=\"Tutorial y c\u00f3digo de ejemplo que te permite averiguar como ejecutar una funci\u00f3n cada x segundos con jQuery usando la funci\u00f3n setInterval().\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta 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