{"id":518,"date":"2017-03-20T20:38:06","date_gmt":"2017-03-20T18:38:06","guid":{"rendered":"http:\/\/fatihsoysal.com\/blog\/?p=518"},"modified":"2018-02-09T21:47:46","modified_gmt":"2018-02-09T19:47:46","slug":"kullanici-etkilesimli-captcha-mantigi-olusturmak-php","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/","title":{"rendered":"Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP}"},"content":{"rendered":"<p>Merhaba. Spam sorununa \u00e7\u00f6z\u00fcm olarak kullan\u0131lan bir\u00e7ok uygulama var. En yayg\u0131n olan\u0131 tabi ki <strong><a href=\"https:\/\/www.google.com\/recaptcha\/intro\/invisible.html\" target=\"_blank\">reCAPTCHA<\/a>.\u00a0<\/strong>\u0130lerleyen s\u00fcre\u00e7te bununla da alakal\u0131 bir makale yazmay\u0131 d\u00fc\u015f\u00fcn\u00fcyorum. Bug\u00fcn, <a href=\"https:\/\/fatihsoysal.com\/blog\/category\/yazilim\/php\/\" target=\"_blank\"><strong>PHP<\/strong> <\/a>yard\u0131m\u0131yla kullan\u0131c\u0131 etkile\u015fimli captcha mant\u0131\u011f\u0131 nas\u0131l olu\u015fturulur bundan bahsedece\u011fim.<\/p>\n<p><strong>\u00d6ncelikle<\/strong> bir session olu\u015fturulmal\u0131.<\/p>\n<pre class=\"lang:php decode:true \">session_start();<\/pre>\n<p><strong>\u0130kinci<\/strong> olarak, Matematiksel Captcha i\u00e7in kullanaca\u011f\u0131m\u0131z say\u0131lar\u0131 \u00fcretiyoruz:<\/p>\n<pre class=\"lang:default decode:true  \">$num1=rand(1,9); \/\/1 ile 9 aras\u0131nda rasgele say\u0131 \u00fcretir.\r\n$num2=rand(1,9); \/\/1 ile 9 aras\u0131nda rasgele say\u0131 \u00fcretir.\r\n$captcha_total=$num1+$num2;<\/pre>\n<p><strong>\u00dc\u00e7\u00fcnc\u00fc<\/strong> olarak, Matematik sorusunu bir de\u011fi\u015fkene aktard\u0131k.<\/p>\n<pre class=\"lang:php decode:true \">$math = \"$num1\".\" + \".\"$num2\".\" =\";<\/pre>\n<p><strong>D\u00f6rd\u00fcnc\u00fc<\/strong> a\u015fama, Match Captcha g\u00f6rselinin \u00f6zelliklerini belireyelim.<\/p>\n<pre class=\"lang:php decode:true\">$image = imagecreatetruecolor(120, 30); \/\/G\u00f6rsel boyutunu say\u0131lardan de\u011fi\u015ftirebilirsiniz\r\n$black = imagecolorallocate($image, 0, 0, 0);\r\n$color = imagecolorallocate($image, 0, 100, 90);\r\n$white = imagecolorallocate($image, 0, 26, 26);<\/pre>\n<p><strong>Son olarak<\/strong> g\u00f6rseli olu\u015ftural\u0131m.<\/p>\n<pre class=\"lang:php decode:true\">imagefilledrectangle($image,0,0,399,99,$white);\r\nimagettftext ($image, 20, 0, 20, 25, $color, $font, $math );\/\/Font boyutunu say\u0131lardan de\u011fi\u015ftirebilirsiniz\r\n\r\nheader(\"Content-type: image\/png\");\r\nimagepng($image);<\/pre>\n<p><strong>captcha.php (T\u00fcm\u00fc)<\/strong><\/p>\n<pre class=\"lang:php decode:true \">session_start();\r\n\r\n$num1=rand(1,9); \/\/Generate First number between 1 and 9  \r\n$num2=rand(1,9); \/\/Generate Second number between 1 and 9  \r\n$captcha_total=$num1+$num2;  \r\n\r\n$math = \"$num1\".\" + \".\"$num2\".\" =\";  \r\n\r\n$_SESSION['rand_code'] = $captcha_total;\r\n\r\n$font = 'mmobuyit-captcha-fonts\/Arial.ttf';\r\n\r\n$image = imagecreatetruecolor(120, 30); \/\/G\u00f6rsel boyutunu say\u0131lardan de\u011fi\u015ftirebilirsiniz.\r\n$black = imagecolorallocate($image, 0, 0, 0);\r\n$color = imagecolorallocate($image, 0, 100, 90);\r\n$white = imagecolorallocate($image, 0, 26, 26);\r\n\r\nimagefilledrectangle($image,0,0,399,99,$white);\r\nimagettftext ($image, 20, 0, 20, 25, $color, $font, $math );\/\/Font boyutunu say\u0131lardan de\u011fi\u015ftirebilirsiniz.\r\n\r\nheader(\"Content-type: image\/png\");\r\nimagepng($image);<\/pre>\n<p><strong>Kontrol Mekanizmas\u0131<\/strong><\/p>\n<pre class=\"lang:php decode:true\">$errors = array();\r\n\r\nif ($_POST['registerUser']) {\r\n\r\n    if (empty($errors) === true) {\r\n\r\n        if (empty($_POST['captcha_entered'])) {\r\n            $errors[] = '&lt;p class = \"input-error\"&gt;L\u00fctfen Captcha sorusuna cevap verin!&lt;\/p&gt;';\r\n        } elseif ($_REQUEST['captcha_entered']!=$_SESSION['rand_code']) {\r\n            $errors[] = '&lt;p class = \"input-error\"&gt;Matematik sorusu cevab\u0131n\u0131z yanl\u0131\u015f&lt;\/p&gt;';\r\n        }\r\n    }   \r\n}<\/pre>\n<p><strong>Form i\u00e7erisinde kullan\u0131m\u0131 (\u00d6rnek)<\/strong><\/p>\n<pre class=\"lang:default decode:true\">&lt;form method=\"post\" class=\"register\" id = \"register-ajax\"&gt;\r\n\r\n&lt;?php \r\nif (empty($_POST) === false &amp;&amp; empty($errors) === true) {\r\n        \r\n    echo 'Success';\r\n       \/\/Buraya ba\u015far\u0131l\u0131 i\u015flem kodlar\u0131... \r\n            \r\n} else if (empty($errors) === false) {\r\n        \r\n    echo output_errors($errors);\r\n}\r\n?&gt;\r\n    &lt;p&gt;\r\n        &lt;img src=\"captcha.php\" \/&gt;\r\n        &lt;input name=\"captcha_entered\" style = \"width: 100px !important;\" type=\"text\" id=\"captcha_entered\" size=\"5\" maxlength=\"2\" placeholder = \"Answer\" \/&gt;\r\n        &lt;input type=\"hidden\" name=\"captcha_total\" id=\"captcha_total\" value=\"&lt;?php echo $_SESSION['rand_code']; ?&gt;\" \/&gt;\r\n    &lt;\/p&gt;\r\n    &lt;p&gt;\r\n        &lt;input type=\"submit\" class=\"button\" name=\"registerUser\" value=\"&lt;?php _e( 'Register' ); ?&gt;\" \/&gt;\r\n    &lt;\/p&gt;\r\n&lt;\/form&gt;<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"Merhaba. Spam sorununa \u00e7\u00f6z\u00fcm olarak kullan\u0131lan bir\u00e7ok uygulama var. En yayg\u0131n olan\u0131 tabi ki reCAPTCHA.\u00a0\u0130lerleyen s\u00fcre\u00e7te bununla da&hellip;","protected":false},"author":1,"featured_media":527,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[133,10],"tags":[153],"class_list":{"0":"post-518","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-php","8":"category-yazilim","9":"tag-kullanici-etkilesimli-captcha-mantigi-olusturmak-php","10":"cs-entry","11":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP} - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/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:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP}\" \/>\n<meta property=\"og:description\" content=\"Merhaba. Spam sorununa \u00e7\u00f6z\u00fcm olarak kullan\u0131lan bir\u00e7ok uygulama var. En yayg\u0131n olan\u0131 tabi ki reCAPTCHA.\u00a0\u0130lerleyen s\u00fcre\u00e7te bununla da&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-20T18:38:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-02-09T19:47:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2017\/03\/robot-captcha-1024x773.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"536\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP}\",\"datePublished\":\"2017-03-20T18:38:06+00:00\",\"dateModified\":\"2018-02-09T19:47:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\"},\"wordCount\":118,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"image\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2017\/03\/robot-captcha-1024x773.png\",\"keywords\":[\"Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP}\"],\"articleSection\":[\"PHP\",\"Yaz\u0131l\u0131m\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/#respond\"]}],\"copyrightYear\":\"2017\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/kullanici-etkilesimli-captcha-mantigi-olusturmak-php\/\",\"name\":\"Kullan\u0131c\u0131 Etkile\u015fimli Captcha Mant\u0131\u011f\u0131 Olu\u015fturmak {PHP} - 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