{"id":3890,"date":"2020-11-04T11:27:57","date_gmt":"2020-11-04T10:27:57","guid":{"rendered":"https:\/\/www.mathweb.fr\/euclide\/?p=3890"},"modified":"2021-04-24T17:01:01","modified_gmt":"2021-04-24T15:01:01","slug":"qr-code-html-et-php","status":"publish","type":"post","link":"https:\/\/www.mathweb.fr\/euclide\/2020\/11\/04\/qr-code-html-et-php\/","title":{"rendered":"QR code, HTML et PHP"},"content":{"rendered":"\n<p>QR code, html et php. Une fois n&#8217;est pas coutume, je vais parler d&#8217;un autre langage que Python.<\/p>\n\n\n\n<p>Tout est parti du probl\u00e8me qu&#8217;a rencontr\u00e9 l&#8217;application <em>TousAntiCovid<\/em> : le QR code g\u00e9n\u00e9r\u00e9 n&#8217;avait pas le bon format de date (<a href=\"https:\/\/www.igen.fr\/app-store\/2020\/11\/attestation-de-deplacement-les-codes-qr-generes-par-tousanticovid-sont-invalides-118695\" target=\"_blank\" rel=\"noreferrer noopener\">voir ici<\/a>)&#8230; J&#8217;avais donc aujourd&#8217;hui envie de faire un article vite fait sur la mani\u00e8re de g\u00e9n\u00e9rer un QR code.<\/p>\n\n\n\n<!--more-->\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Au menu sur cette page...<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.mathweb.fr\/euclide\/2020\/11\/04\/qr-code-html-et-php\/#QR_code_HTML_et_PHP_quel_langage_choisir\" >QR code, HTML et PHP : quel langage choisir ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.mathweb.fr\/euclide\/2020\/11\/04\/qr-code-html-et-php\/#QR_code_HTML_et_PHP_le_script\" >QR code, HTML et PHP : le script<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.mathweb.fr\/euclide\/2020\/11\/04\/qr-code-html-et-php\/#Le_resultat\" >Le r\u00e9sultat<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"QR_code_HTML_et_PHP_quel_langage_choisir\"><\/span>QR code, HTML et PHP : quel langage choisir ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Il existe de nombreuses fa\u00e7ons de g\u00e9n\u00e9rer un QR code: en Python, en PHP, en C, &#8230; mais je vais ici me pencher sur le PHP.<\/p>\n\n\n\n<p>En fait, \u00e0 l&#8217;aide d&#8217;une API, on peut m\u00eame utiliser le simple HTML, mais pour conna\u00eetre la date et l&#8217;heure pr\u00e9cise de l&#8217;instant pr\u00e9sent, PHP sera utile.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"QR_code_HTML_et_PHP_le_script\"><\/span>QR code, HTML et PHP : le script<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"php\" data-enlighter-theme=\"dracula\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php \nfunction qrcode() {\n\tif(isset($_SERVER['HTTPS']) &amp;&amp; $_SERVER['HTTPS'] === 'on') \n\t\t$url = \"https\"; \n\t  else\n\t\t$url = \"http\"; \n\n\t  $url .= \":\/\/\"; \n\t  $url .= $_SERVER['HTTP_HOST']; \n\t  $url .= $_SERVER['REQUEST_URI']; \n\n\tif ( !isset($_GET['now']) ) {\n\t\tdate_default_timezone_set('UTC'); \/\/ d\u00e9finir le fuseau horaire \u00e0 utiliser par d\u00e9faut\n\t\t$now = date('D-M-j-Y-G-i');\n\t\treturn \"&lt;img id='barcode' src='https:\/\/api.qrserver.com\/v1\/create-qr-code\/?data=\" .$url . \"?now=\" . $now .\"&amp;amp;size=400x400' width='400' height='400' \/>\";\n\t}\n\telse {\n\t\treturn \"Date : \" . $_GET['now'];\n\t}\n}\n?><\/pre>\n\n\n\n<p>Ce code est \u00e0 ins\u00e9rer dans le corps du HTML.<\/p>\n\n\n\n<p>La premi\u00e8re partie identifie l&#8217;URL courante et la seconde g\u00e9n\u00e8re un QR code redirigeant vers la page courante avec une variable (&#8220;now&#8221;) transmise avec la m\u00e9thode GET.<\/p>\n\n\n\n<p>Si la variable est pr\u00e9sente alors le QR code ne s&#8217;affiche pas et la date s&#8217;affiche telle qu&#8217;elle a \u00e9t\u00e9 transmise.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Le_resultat\"><\/span>Le r\u00e9sultat<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>[qrcode size=200]<\/p>\n\n\n\n<p>Une fois que la date est transmise, un petit formatage permet de l&#8217;afficher au format que l&#8217;on souhaite. Telle qu&#8217;elle a \u00e9t\u00e9 ici transmise, on peut dans un premier temps la scinder en fonction des traits d&#8217;union:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"php\" data-enlighter-theme=\"dracula\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"false\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$date = explode(\"-\",$_GET['now']);\n$jour = Array( \"Mon\" => \"Lundi\" , \n\t\"Tue\" => \"Mardi\" , \"Wed\" => \"Mercredi\" ,\n\t\"Thu\" => \"Jeudi\", \"Fri\" => \"Vendredi\" ,\n\t\"Sat\" => \"Samedi\" ,  \"Sun\" => \"Dimanche\" );\n$mois = Array( \"Jan\" => \"Janvier\" , \"Feb\" => \"F\u00e9vrier\" ,\n\t\t\"Mar\" => \"Mars\" , \"Apr\" => \"Avril\" ,\n\t\t\"May\" => \"Mai\" , \"Jun\" => \"Juin\" ,\n\t\t\"Jul\" => \"Juilet\" , \"Aug\" => \"Ao\u00fbt\" ,\n\t\t\"Sep\" => \"Septembre\" , \t\"Oct\" => \"Octobre\" ,\n\t        \"Nov\" => \"Novembre\" , \"Dec\" => \"D\u00e9cembre\");\n$now = $jour[$date[0]] . \" \" . $date[2] . \" \" . $mois[$date[1]] . \" \" . $date[3];\nreturn \"&lt;p>Vous avez \u00e9t\u00e9 redirig\u00e9\u00b7e\u00b7s avec la date : \" . $now.\"&lt;\/p>\";<\/pre>\n\n\n\n<p>Il va de soit que le formatage est \u00e0 notre convenance. J&#8217;ai pris ici la d\u00e9cision de convertir les abr\u00e9viations en mots complets et en fran\u00e7ais. Mais il y avait plus simple pour cela. En effet, on peut utiliser <code>setlocale(LC_TIME, \"fr_FR\");<\/code><\/p>\n\n\n\n<p>Mais comme mentionn\u00e9 plus haut, j&#8217;\u00e9cris cet article \u00e0 la va-vite. Je n&#8217;ai pas pris le temps d&#8217;am\u00e9liorer le script&#8230; <\/p>\n","protected":false},"excerpt":{"rendered":"<p>QR code, html et php. Une fois n&#8217;est pas coutume, je vais parler d&#8217;un autre langage que Python. Tout est parti du probl\u00e8me qu&#8217;a rencontr\u00e9 l&#8217;application TousAntiCovid : le QR code g\u00e9n\u00e9r\u00e9 n&#8217;avait pas le bon format de date (voir ici)&#8230; J&#8217;avais donc aujourd&#8217;hui envie de faire un article vite [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3896,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[248,249,74],"class_list":["post-3890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-informatique","tag-html","tag-php","tag-qrcode"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>QR code, HTML et PHP - Mathweb.fr - G\u00e9n\u00e9ration simple<\/title>\n<meta name=\"description\" content=\"Tout est parti du probl\u00e8me qu&#039;a rencontr\u00e9 l&#039;application TousAntiCovid : le QR code g\u00e9n\u00e9r\u00e9 HTML et PHP n&#039;avait pas le bon format de date...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mathweb.fr\/euclide\/2020\/11\/04\/qr-code-html-et-php\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"QR code, HTML et PHP - 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