How to check whether there is an external link in a string in php, php string_PHP tutorial

php method to check whether there are external links in a string, php string

The example in this article describes the method of php checking whether there are external links in a string. Share it with everyone for your reference. The specific implementation method is as follows:

/**
 * is_external_link 检测字符串是否包含外链
 * @param string $text 文字
 * @param string $host 域名
 * @return boolean    false 有外链 true 无外链
 * /
function all_external_link($text = '', $host = '') {
  if (empty($host)) $host = $_SERVER['HTTP_HOST'];
  $reg = '/http(?:s?):\/\/((?:[A-za-z0-9-]+\.)+[A-za-z]{2,4})/';
  preg_match_all($reg, $text, $data);
  $math = $data[1];
  foreach ($math as $value) {
    if($value != $host) return false;
  }
  return true;
}

I hope this article will be helpful to everyone’s PHP programming design.

http://www.bkjia.com/PHPjc/1039201.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1039201.htmlTechArticlephp method to check whether there are external links in a string, php string This article describes the example of php checking a string Is there any way to external links? Share it with everyone for your reference. The specific implementation methods are as follows...