{"id":26582,"date":"2022-12-18T19:08:48","date_gmt":"2022-12-18T13:38:48","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/"},"modified":"2022-12-18T19:08:48","modified_gmt":"2022-12-18T13:38:48","slug":"solved-preventing-duplicates-in-the-database-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/","title":{"rendered":"[Solved] Preventing duplicates in the database [closed]"},"content":{"rendered":"

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I update your code.<\/p>\n

<?php\n    mysql_connect(\"localhost\", \"root\", \"\") or die(mysql_error()); \n    mysql_select_db(\"database\") or die(mysql_error());\n?>\n<html>\n<head>\n<title>Student list<\/title>\n<link href=\"https:\/\/stackoverflow.com\/questions\/11200978\/stylesheets\/public.css\" media=\"all\" rel=\"stylesheet\" type=\"text\/css\"\/>\n<\/head>\n<body id=\"background\">\n<table >\n  <tr>\n    <td><img src=\" images\/Picture3.png\" width=\"1300\" height=\"150\"\/><\/td>\n  <\/tr>\n<\/table>\n<table>\n  <tr>\n    <td id=\"structure\">\n    <? \n    \/\/ check for post data\n    if( isset($_POST['name']) && isset($_POST['email']) && isset($_POST['shift']) && isset($_POST['class']) && isset($_POST['id']) )\n    {\n        $name=$_POST['name']; \n        $email=$_POST['email']; \n        $shift=$_POST['shift'];\n        $class=$_POST['class'];\n        $id=$_POST['id'];\n\n        $username = $_POST['name']; \/\/ you must escape any input. Remember.\n\n        $query = \"SELECT * FROM `data` WHERE `name` = '\".$username.\"'\";\n\n        $result = mysql_query($query);\n        \/\/ check for duplicate\n        if ( mysql_num_rows ( $result ) > 1 )\n        {\n            echo 'Username already exists';\n        }\n        else\n        {\n            \/\/ insert new record\n            mysql_query(\"INSERT INTO `data`(name,email,shift,class) VALUES ('\".$name.\"', '\".$email.\"', '\".$shift.\"','\".$class.\"')\");  \n            print \"Your information has been successfully added to the database.\"; \n        }\n    }\n\n    \/\/ list data\n    $data = mysql_query(\"SELECT * FROM data\")  or die(mysql_error()); \n    print \"<table border cellpadding=5>\"; \n    while($info = mysql_fetch_array( $data )) \n    {\n        print \"<tr>\";\n        print \"<th>Id:<\/th><td>\".$info['id'].\"<\/td>\";\n        print \"<th>Name:<\/th> <td>\".$info['name'] . \"<\/td> \"; \n        print \"<th>Email:<\/th> <td>\".$info['email'] . \" <\/td>\";\n        print \"<th>shift:<\/th> <td>\".$info['shift'] . \" <\/td>\";\n        print \"<th>class:<\/th> <td>\".$info['class'] . \" <\/td>\";\n        print \"<tr><td><a href=\"update.php?id={$info[\"id']}'>EDIT<\/a><\/td><\/tr>\";\n        print \"<tr><td><a href=\"delete.php?id={$info[\"id']}'>DELETE<\/a><\/td><\/tr>\";\n    } \n    print \"<\/table>\"; \n\n  ?>\n  <\/td>\n  <\/tr>\n<\/table>\n<\/body>\n<\/html>\n<\/code><\/pre>\n<\/p><\/div>\n
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            3<\/span> <\/p><\/div>\n<\/div>\n
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solved Preventing duplicates in the database  [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] I update your code. <?php mysql_connect(“localhost”, “root”, “”) or die(mysql_error()); mysql_select_db(“database”) or die(mysql_error()); ?> <html> <head> <title>Student list<\/title> <link href=”https:\/\/stackoverflow.com\/questions\/11200978\/stylesheets\/public.css” media=”all” rel=”stylesheet” type=”text\/css”\/> <\/head> <body id=”background”> <table > <tr> <td><img src=” images\/Picture3.png” width=”1300″ height=”150″\/><\/td> <\/tr> <\/table> <table> <tr> <td id=”structure”> <? \/\/ check for post data if( isset($_POST[‘name’]) && isset($_POST[’email’]) && isset($_POST[‘shift’]) && isset($_POST[‘class’]) … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[546,339],"class_list":["post-26582","post","type-post","status-publish","format-standard","hentry","category-solved","tag-database","tag-php"],"yoast_head":"\n[Solved] Preventing duplicates in the database [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Preventing duplicates in the database [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I update your code. <?php mysql_connect("localhost", "root", "") or die(mysql_error()); mysql_select_db("database") or die(mysql_error()); ?> <html> <head> <title>Student list<\/title> <link href="https:\/\/stackoverflow.com\/questions\/11200978\/stylesheets\/public.css" media="all" rel="stylesheet" type="text\/css"\/> <\/head> <body id="background"> <table > <tr> <td><img src=" images\/Picture3.png" width="1300" height="150"\/><\/td> <\/tr> <\/table> <table> <tr> <td id="structure"> <? \/\/ check for post data if( isset($_POST['name']) && isset($_POST['email']) && isset($_POST['shift']) && isset($_POST['class']) ... 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Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/","og_site_name":"JassWeb","article_published_time":"2022-12-18T13:38:48+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] Preventing duplicates in the database [closed]","datePublished":"2022-12-18T13:38:48+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/"},"wordCount":20,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["database","php"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/","url":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/","name":"[Solved] Preventing duplicates in the database [closed] - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-12-18T13:38:48+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-preventing-duplicates-in-the-database-closed\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] Preventing duplicates in the database [closed]"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1777613206","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1777613206","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1777613206","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/26582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=26582"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/26582\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=26582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=26582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=26582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}