Can't access class parameter values from function inside the class

Question

Trying to access object parameter value from the class in function print_debug_info() and getting runtime error.

class debugInfoAPICall
{
    var $uri         = "";
    var $request     = "";
    var $response    = "";
    var $signature   = "";
    var $timestamp   = "";
    var $exectime    = -1;
    var $httpcode    = -1;

    function __construct($uri, $request, $response, $signature, $timestamp, $exectime, $httpcode) {
        $this->uri          = $uri;
        $this->request      = $request;
        $this->response     = $response;
        $this->signature    = $signature;
        $this->timestamp    = $timestamp;
        $this->exectime     = $exectime;
        $this->httpcode     = $httpcode;
    }

    function print_debug_info (){

        echo "<b>API:</b> <font class=\"text-info\">" . $this->$uri . "</font> <br>";
        if ($this->httpcode != 200){
            echo "<span class=\"glyphicon glyphicon-alert\" style=\"color:#FF8C00\"></span> <b>Response Time:</b> <font class=\"text-danger\">" . $this->httpcode . "</font> <br>";
        }else{
            echo "<b>HTTP Code:</b> " . $this->httpcode . " <br>";
        }
        if ($this->exectime > 500){
            echo "<span class=\"glyphicon glyphicon-alert\" style=\"color:#FF8C00\"></span> <b>Response Time:</b> <font class=\"text-danger\">" . $this->$exectime . " ms</font> <br>";
        }else{
            echo "<b>Response Time:</b> " . $this->exectime . " ms<br>";
        }
        echo "<b>Timestamp:</b> " . $this->timestamp . " <br>";
        echo "<b>Signature:</b> " . $this->signature . " <br><br>";
        echo "<b>Request Data JSON:</b> <pre>" . $this->request . "</pre> <br>";
        echo "<b>Response Data JSON:</b> <pre>" . $this->response . "</pre> <br>";
    }   
}

When accessing from outside the class there is no problem to get the parameter values of the object and print them so the below works fine.

foreach ($apiCallLog as &$value) {

            echo "<b>URI:</b> " . $value->uri . " <br>";
            if ($value->httpcode != 200){
                echo "<span class=\"glyphicon glyphicon-alert\" style=\"color:#FF8C00\"></span> <b>Response Time:</b> <font class=\"text-danger\">" . $value->httpcode . "</font> <br>";
            }else{
                echo "<b>HTTP Code:</b> " . $value->httpcode . " <br>";
            }
            if ($value->exectime > 500){
                echo "<span class=\"glyphicon glyphicon-alert\" style=\"color:#FF8C00\"></span> <b>Response Time:</b> <font class=\"text-danger\">" . $value->exectime . " ms</font> <br>";
            }else{
                echo "<b>Response Time:</b> " . $value->exectime . " ms<br>";
            }
            echo "<b>Timestamp:</b> " . $value->timestamp . " <br>";
            echo "<b>Signature:</b> " . $value->signature . " <br>";
            echo "<b>Request Data JSON:</b> <pre>" . $value->request . "</pre> <br>";
            echo "<b>Response Data JSON:</b> <pre>" . $value->response . "</pre> <br>";

        }
        unset($value);

However this one is not working and throwing: Notice: Undefined variable: uri in /path/functions.php on line 27

foreach ($apiCallLog as &$value) {
    $value->print_debug_info();
}

Drakes · Accepted Answer · 2015-06-06 16:03:09Z

1

In print_debug_info, change

$this->$uri

to

$this->uri

Also, change all like this (remove the $ after the -> everywhere in print_debug_info). This is the proper way to access class parameters. These were probably just typos in your code. ;)

answered Jun 6, 2015 at 16:03

Drakes

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