Six Useful PHP code snippets

Six Useful PHP code snippets

 
 

Here’s a mini list of  useful PHP code snippets that we find using on a weekly basis. You could use these as is or expand them as part of other applications or add them to a php class.
 

Adjust server time

Useful if you have a server in a different timezone, like us... You can fix funny things happen when you add the time to a MySQL database, by adding or subtracting hours as in the example below.
 

$now = date('Y-m-d-G'); 
$now = strftime("%Y-%m-%d-%H", strtotime("$now -8 hours"));

Convert HEX value to RBG

function hextorgb($hexvalue){

        if($hexvalue[0] == '#') {
                $hexvalue = substr( $hexvalue, 1);
        }
        if(strlen( $hexvalue ) == 6){
                list($r, $g, $b) = array($hexvalue[0] .$hexvalue[1], $hexvalue[2] . $hexvalue[3], $hexvalue[4] .$hexvalue[5]);
        }elseif (strlen($hexvalue) == 3) {
                list($r,$g,$b) = array($hexvalue[0] .$hexvalue[0], $hexvalue[1] . $hexvalue[1], $hexvalue[2] .$hexvalue[2]);
        }else{
                return false;
        }
        $r = hexdec($r);
        $g = hexdec($g);
        $b = hexdec($b);
        return array('R' => $r, 'G' => $g, 'B' => $b);
}
 
$rgb = hextorgb('#fff000');
 
print_r($rgb);

Display a users Gravatar image

function url_to_link($text){

            $reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
            // Check if there is a url in the string
            if (preg_match_all($reg_exUrl, $text, $url)) {
                foreach($url[0] as $v){
                    $position = strpos($text,' '.$v)+1;
                    $text = substr_replace($text,'',$position, strlen($v));
                    $text = substr_replace($text,''.$v.'',$position ,0);
                }
                return $text;
            }
            else {
                // if no urls in the text just return the text
                return $text;
            }
        }
 
$string = 'This is a string of text and we have a link: http://ma-no.org we also have another link http://google.com';
echo url_to_link($string);

Parse JSON in PHP

$json='{"id":0,"name":"Silvia","surname":"Salvietta","Website":"http://ma-no.org"} ';

 $array=json_decode($json);
 // print  the array
 print_r($array);
echo $array->name;

 

 
 


We use our own cookies and third-party cookies to improve our services, show products based on your preferences, analyse the browsing habits of our users, and enable interaction with social networks. Continuing to browse our sites implies full acceptance of their use. You can change your cookie setting or get more information here: Cookies policy .