php searching from a directory

I creating a search option . where user input city name and see a person details who live in that city . Or user can leave blank input to see all person .

I don't see any error in this code . Checked every php validtor , I find . But this don't output anything

     `<?php

       $find_city = $_POST['find']; //form 

         //if user input nothing see all file             

        if (empty($find_city))
        {
            $find_city = 'ALL';
        }

         //directory open

        $dirname = "gimg";
        $dirhandle = opendir($dirname);

        //check directory

        if($dirhandle)
        {
            while (false !== ($file = readdir($dirhandle)))
            {
                if($file != '.' && $file != '..')
                {
                    displayPropertyInfo($file,$find_city);
                }
            }
        }

        //funtion Definitions

        function displayPropertyInfo($img_filename, $find_city)
        {

            $img_name = 'gimg/'.$img_filename;
            $g_img = "<img src='".$img_name."'>";

            //filename type changing from one directory to another

            $g_info = str_replace('.jpg' , '.txt', $img_filename);

            $filename = 'ginfo/'.$g_info;

            $fp  = fopen($filename, 'r');

            $show_grile = 'Y';

           //search function

            while(true)
            {
                $line = fgets($fp);

                if (feof($fp))
                {
                    break;
                }

                $pos = stripos($line, 'City:');

                if ($pos !== false)
                {
                    $city = substr($line,5);
                    $city = trim($city);

                    if ($find_city != 'ALL')
                    {
                        $subpos = stripos($city,$find_city);

                        if($subpos === false)
                        {
                            $show_gril = 'N';
                            break;
                        }
                    }
                }
                //checking 
                $pos = stripos($line,'Name:');

                if ($pos !== false)
                {
                    $name = substr($line, 5);
                    $name = trim($name);
                }

                $pos = stripos($line,'Age:');

                if ($pos !== false)
                {
                    $age = substr($line, 4);
                    $age = trim($age);
                }
                $pos = stripos($line,'Price:');

                if ($pos !== false)
                {
                    $price = substr($line, 6);
                    $price = trim($price);
                }
                $pos = stripos($line,'Description:');

                if ($pos !== false)
                {
                    $description = substr($line, 12);
                    $description = trim(description);
                }

            }

            if($show_gril == 'Y')
            {
                print $g_img;

                print "City: ".$city."<br/>";
                print "Name: ".$name."<br/>";
                print "Age: ".$age."<br/>";
                print "Price: ".$price."<br/>";
                print "Description: ".$description."<br/>";
            }
        }
    ?>