PHP development form verification email and URL

PHP - Validation Name

The following code will use a simple way to detect whether the name field contains letters and spaces. If the name field value is illegal, error message will be output:

$name = test_input($_POST["name"]);
if (!preg_match("/^[a-zA-Z ]*$/",$name))
  {
  $nameErr = "只允许字母及空格"; 
  }

PS:

preg_match — perform regular expression matching.

int preg_match ( string $pattern , string $subject [, array $matches [, int $flags ]] )

PHP - Verification Email

The following code will check whether the e-mail address is legitimate in a simple way. If the e-mail address is illegal, an error message will be output:

$email = test_input($_POST["email"]);
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email))
  {
  $emailErr = "非法邮件地址"; 
  }

PHP - Validate URL

The following code will check whether the URL address is legal (the following regular expression runs in the URL containing dashes: "-"). If the URL address is illegal, an error message will be output:

$website = test_input($_POST["website"]);
if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website))
  {
  $websiteErr = "不合法的 URL"; 
  }

PHP - Validate Name, E-mail, and URL

The code is as follows:

Example

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