Validating form data with php is essential to avoid security issue with your website. The hacker can use your form to input the virus or the script to hack important data from your website.<\/p>\n
Let check the Html form that validates your form details.<\/p>\n
Example<\/strong><\/p>\n [php]<?php if ($_SERVER["REQUEST_METHOD"] == "POST") { function test_input($data) { [php]<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> [php]<?php In the above example, we are using PHP_SELP method to get the data of the php. When form executed the user will see the details on the same page.<\/p>\n In the php function first step is to define the variable with empty values. Next we will be using if statement to assign the request method at post value. In this code we have added each variable to its html form value and we have given [php]if ($_SERVER["REQUEST_METHOD"] == "POST") { After that, we will be verifying the user’s input data with the php functions. To do that we will be running our function [php][\/php]function test_input($data) { The php function The function The function In the end, we get the result of the users on the page. You need to use echo statement to get the form details to present on the page.<\/p>\n","protected":false},"excerpt":{"rendered":" Validating form data with php is essential to avoid security issue with your website. The hacker can use your form to input the virus or<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-344","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/posts\/344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/comments?post=344"}],"version-history":[{"count":1,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/posts\/344\/revisions"}],"predecessor-version":[{"id":345,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/posts\/344\/revisions\/345"}],"wp:attachment":[{"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/media?parent=344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/categories?post=344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mddir.com\/how-to\/wp-json\/wp\/v2\/tags?post=344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\/\/ define variables and set to empty values
\n$name = $email = $gender = $comment = $website = "";<\/p>\n
\n $name = test_input($_POST["name"]);
\n $email = test_input($_POST["email"]);
\n $website = test_input($_POST["website"]);
\n $comment = test_input($_POST["comment"]);
\n $gender = test_input($_POST["gender"]);
\n}<\/p>\n
\n $data = trim($data);
\n $data = stripslashes($data);
\n $data = htmlspecialchars($data);
\n return $data;
\n}
\n?>[\/php]<\/p>\nPHP Form Validation Example<\/h2>\n
\n Name: <input type="text" name="name">
\n <br><br>
\n E-mail: <input type="text" name="email">
\n <br><br>
\n Website: <input type="text" name="website">
\n <br><br>
\n Comment: <textarea name="comment" rows="5" cols="40"><\/textarea>
\n <br><br>
\n Gender:
\n <input type="radio" name="gender" value="female">Female
\n <input type="radio" name="gender" value="male">Male
\n <br><br>
\n <input type="submit" name="submit" value="Submit">
\n<\/form>[\/php]<\/p>\n
\necho "<h2>Your Input:<\/h2>";
\necho $name;
\necho "<br>";
\necho $email;
\necho "<br>";
\necho $website;
\necho "<br>";
\necho $comment;
\necho "<br>";
\necho $gender;
\n?>[\/php]<\/p>\n
\n
\n$name = $email = $gender = $comment = $website = \"\";<\/code><\/p>\ntest_input<\/code> a function name to the value.<\/p>\n
\n $name = test_input($_POST["name"]);
\n $email = test_input($_POST["email"]);
\n $website = test_input($_POST["website"]);
\n $comment = test_input($_POST["comment"]);
\n $gender = test_input($_POST["gender"]);
\n}[\/php]<\/p>\ntext_input($data)<\/code> through the security check php functions as given below.<\/p>\n
\n $data = trim($data);
\n $data = stripslashes($data);
\n $data = htmlspecialchars($data);
\n return $data;
\n}<\/p>\ntrim()<\/code> is actually trims the data by removing unwanted space from the user’s input.<\/p>\nstripslashes()<\/code> removes the lash from the input data.<\/p>\nhtmlspecialchars()<\/code> replace the special characters to the HTML format.<\/p>\n