{"id":7121,"date":"2022-09-07T00:32:14","date_gmt":"2022-09-06T19:02:14","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-php-highcharts-js-convert-from-mysql-to-mysqli-causes-error-duplicate\/"},"modified":"2022-09-07T00:32:14","modified_gmt":"2022-09-06T19:02:14","slug":"solved-php-highcharts-js-convert-from-mysql-to-mysqli-causes-error-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-php-highcharts-js-convert-from-mysql-to-mysqli-causes-error-duplicate\/","title":{"rendered":"[Solved] php + Highcharts.js + convert from mysql to mysqli causes error [duplicate]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-23075940\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"23075940\" data-parentid=\"23075645\" data-score=\"-2\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>If you are going to convert your code to <code>mysqli_*<\/code>, then it should be in a <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/php.net\/manual\/en\/mysqli.prepare.php\">prepared statement<\/a> manner.<\/p>\n<p>Lets re-establish your MySQL connection in <code>db.inc.php<\/code>:<\/p>\n<pre><code>&lt;?php\n\n  $conn = new mysqli(\"localhost\", \"Datenbank-Username\", \"Datenbank-Passwort\", \"Datenbank-Name\");\n\n  \/* CHECK CONNECTION *\/\n  if (mysqli_connect_errno()) {\n    printf(\"Connect failed: %s\\n\", mysqli_connect_error());\n    exit();\n  }\n\n  \/* CHANGE CHARACTER SET TO utf8 *\/\n  if (!$conn-&gt;set_charset(\"utf8\")) {\n    printf(\"Error loading character set utf8: %s\\n\", $mysqli-&gt;error);\n    exit();\n  } else {\n    printf(\"Current character set: %s\\n\", $mysqli-&gt;character_set_name());\n  }\n\n  define(\"listViewTempPeriod\", 24); \/\/ Anzeige der Stunden die ausgegeben werden sollen\n  define(\"NUMSENSORS\", 2);          \/\/ Anzahl der Sensoren deren Werte in der Datenbank stehen\n\n?&gt;\n<\/code><\/pre>\n<p>Your file where you store your functions (<code>functions.inc.php<\/code>):<\/p>\n<pre><code>&lt;?php\n\n  function delLastChar($string=\"\")\n  {\n    global $conn;\n    $t = substr($string, 0, -1);\n    return($t);\n  }\n\n  function getChartValues($sensorID=0, $timePeriodInHours=24)\n  {\n\n    global $conn;\n\n    if($stmt = $conn-&gt;prepare(\"SELECT DATE_FORMAT(datumzeit, '%H') AS STUNDE, sensorwert FROM arduino_sensorwerte WHERE sensorid = ? AND datumzeit &gt;= date_sub(NOW(), interval ? hour) AND datumzeit &lt;= NOW() GROUP BY DATE_FORMAT(datumzeit, '%Y-%m-%d %H') ORDER BY datumzeit DESC\")){\n      $stmt-&gt;bind_param(\"ii\", $sensorID, $timePeriodInHours);\n      $stmt-&gt;execute();\n      $stmt-&gt;store_result();\n      $n_data = $stmt-&gt;num_rows;\n      $stmt-&gt;bind_result($stunde, $sensorwert);\n\n      $chartValues=\"\";\n      $stundenValues=\"\";\n\n      while($stmt-&gt;fetch()){\n\n        $charValues    = $sensorwert;\n        $stundenValues = $stunde;\n\n      } \/* END OF WHILE LOOP *\/\n      $stmt-&gt;close();\n    } \/* END OF PREPARED STATEMENT *\/\n\n    $chartValues   = delLastChar($chartValues);     \/\/ Komma hinter dem letzten Temperaturwert entfernen\n    $stundenValues = delLastChar($stundenValues);   \/\/ Komma hinter letzter Stunde entfernen\n\n    return array($chartValues, $stundenValues);\n\n  } \/* END OF getChartValues FUNCTION *\/\n\n  function getSensorSettings($sensorID=0)\n  {\n\n    global $conn;\n\n    $stmt = $conn-&gt;prepare(\"SELECT mpcharttype, mplinetype, mpname, mpdescription, mplinecolor FROM arduino_messpunkte WHERE messpunktid = ?\");\n    $stmt-&gt;bind_param(\"i\", $sensorID);\n    $stmt-&gt;execute();\n    $stmt-&gt;store_result();\n    $n_data = $stmt-&gt;num_rows;\n    $stmt-&gt;bind_result($mpcharttype, $mplinetype, $mpName, $mpDescription, $mpLineColor);\n\n    if($n_data &gt; 0)\n    {\n      while($stmt-&gt;fetch()){\n\n        switch ($mpcharttype) \n        {\n          case 1:\n            $mpChartType=\"spline\";\n            break;\n          case 2:\n            $mpChartType=\"line\";\n            break;\n          case 3:\n            $mpChartType=\"areaspline\";\n            break;\n          case 4:\n            $mpChartType=\"area\";\n            break;\n          case 5:\n            $mpChartType=\"column\";\n            break;    \n          case 6:\n            $mpChartType=\"bar\";\n            break;    \n          } \/* END OF FIRST SWITCH *\/\n\n        switch ($mplinetype) \n        {\n          case 1:\n            $mpLineType=\"solid\";\n            break;\n          case 2:\n            $mpLineType=\"ShortDash\";\n            break;\n          case 3:\n            $mpLineType=\"ShortDot\";\n            break;\n          case 4:\n            $mpLineType=\"ShortDashDot\";\n            break;\n          case 5:\n            $mpLineType=\"ShortDashDotDot\";\n            break;    \n          case 6:\n            $mpLineType=\"Dot\";\n            break;\n          case 7:\n            $mpLineType=\"Dash\";\n            break;\n          case 8:\n            $mpLineType=\"LongDash\";\n            break;\n          case 9:\n            $mpLineType=\"DashDot\";\n            break;\n          case 10:\n            $mpLineType=\"LongDashDot\";\n            break;\n          case 11:\n            $mpLineType=\"LongDashDotDot\";\n            break;              \n        } \/* END OF SECOND SWITCH *\/\n\n      } \/* END OF WHILE LOOP *\/\n\n      return array($mpChartType, $mpLineType, $mpName, $mpDescription, $mpLineColor);\n\n    } \/* END OF CHECKING NUMBER OF RESULTS *\/\n\n  } \/* END OF getSensorSettings FUNCTION *\/\n\n?&gt;\n<\/code><\/pre>\n<p>If you expect a query to have one row of result only, you don&#8217;t need to loop it anymore.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">23<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved php + Highcharts.js + convert from mysql to mysqli causes error [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] If you are going to convert your code to mysqli_*, then it should be in a prepared statement manner. Lets re-establish your MySQL connection in db.inc.php: &lt;?php $conn = new mysqli(&#8220;localhost&#8221;, &#8220;Datenbank-Username&#8221;, &#8220;Datenbank-Passwort&#8221;, &#8220;Datenbank-Name&#8221;); \/* CHECK CONNECTION *\/ if (mysqli_connect_errno()) { printf(&#8220;Connect failed: %s\\n&#8221;, mysqli_connect_error()); exit(); } \/* CHANGE CHARACTER SET TO utf8 *\/ &#8230; <a title=\"[Solved] php + Highcharts.js + convert from mysql to mysqli causes error [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-php-highcharts-js-convert-from-mysql-to-mysqli-causes-error-duplicate\/\" aria-label=\"More on [Solved] php + Highcharts.js + convert from mysql to mysqli causes error [duplicate]\">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":[340,1117,339],"class_list":["post-7121","post","type-post","status-publish","format-standard","hentry","category-solved","tag-mysql","tag-mysqli","tag-php"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] php + Highcharts.js + convert from mysql to mysqli causes error [duplicate] - 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-php-highcharts-js-convert-from-mysql-to-mysqli-causes-error-duplicate\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] php + Highcharts.js + convert from mysql to mysqli causes error [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] If you are going to convert your code to mysqli_*, then it should be in a prepared statement manner. Lets re-establish your MySQL connection in db.inc.php: &lt;?php $conn = new mysqli(&quot;localhost&quot;, &quot;Datenbank-Username&quot;, &quot;Datenbank-Passwort&quot;, &quot;Datenbank-Name&quot;); \/* CHECK CONNECTION *\/ if (mysqli_connect_errno()) { printf(&quot;Connect failed: %sn&quot;, mysqli_connect_error()); exit(); } \/* CHANGE CHARACTER SET TO utf8 *\/ ... 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Lets re-establish your MySQL connection in db.inc.php: &lt;?php $conn = new mysqli(\"localhost\", \"Datenbank-Username\", \"Datenbank-Passwort\", \"Datenbank-Name\"); \/* CHECK CONNECTION *\/ if (mysqli_connect_errno()) { printf(\"Connect failed: %sn\", mysqli_connect_error()); exit(); } \/* CHANGE CHARACTER SET TO utf8 *\/ ... 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