HashTrie | PHP Web App Tutorial

What's Covered

This tutorial illustrates how to use the API in a Web project. The following aspects are covered:
Import detector settings from php.ini file
Create an instance of Provider
Print a table of details relating to the data set
Process a match for requests User-Agent HTTP header and print a table of properties
Process a match for requests relevant headers and print a table of properties
Code and Explanation

											
if (extension_loaded(FiftyOneDegreesPatternV3)) {
    require("../pattern/FiftyOneDegreesPatternV3.php");
    $provider = FiftyOneDegreesPatternV3::provider_get();
}
elseif (extension_loaded(FiftyOneDegreesTrieV3)) {
    require("../trie/FiftyOneDegreesTrieV3.php");
    $provider = FiftyOneDegreesTrieV3::provider_get();
}
else {
    echo "No 51Degrees PHP detector module found!<br>\n Please install and add entry to your php.ini file<br>\n";
}
// List of all relevant HTTP headers
$allHttpHeaders_in = $provider->getHttpHeaders();
for($i=0;$i<$allHttpHeaders_in->size();$i++) {
    $allHttpHeaders[$i] = $allHttpHeaders_in->get($i);
}
// Information about data set.

// Determine if Pattern or Trie detector is used.
$isPattern = True;
$algorithmUsed = "Pattern";
if (strpos($provider->getDataSetName(), 'Trie') !== false) {
    $isPattern = FALSE;
    $algorithmUsed = "Trie";
}

// List of properties as declared in PHP.ini file.
// List may be different to properties contained in the initialised data set.
// Some properties may not be in the data set you are trying to use.
// I.e. Lite data set does not contain properties like IsTablet or DeviceType.
if ($isPattern) {
$iniProperties = ini_get('FiftyOneDegreesPatternV3.property_list');
$properties = explode(",", $iniProperties);
}
elseif ($algorithmUsed == "Trie") {
$iniProperties = ini_get('FiftyOneDegreesTrieV3.property_list');
$properties = explode(",", $iniProperties);
}


if ($properties[1] == null) {
    $properties_in = $provider->getAvailableProperties();
    for ($i=0;$i<$properties_in->size();$i++) {
        $properties[$i] = $properties_in->get($i);
    }
}

// 51Degrees Logo image link.
$logoImage = getWebsiteLink("image", $isPattern);

?>
<!DOCTYPE html>
<html>
<head>
    <link rel="stylesheet" type="text/css" href="https://51degrees.com/Demos/examples.css" class="inline"/>
</head>
<body>
<div class="content">
<p>
<img src="<?=$logoImage; ?>"
alt="51Degrees logo image for PHP C Extension."/>
</p>
<h1>PHP <?=$algorithmUsed; ?> - Device Detection Example</h1>
<?php
printInfoTable($provider, $isPattern);

printHttpHeaders($allHttpHeaders, "User-Agent", array("HTTP_USER_AGENT"));
$match_ua = $provider->getMatch($_SERVER['HTTP_USER_AGENT']);
printArrayToTable($match_ua, $properties, $isPattern, "ua");

printHttpHeaders($allHttpHeaders, "HTTP Headers");
$httpHeaders = "";
//Get all HTTP headers from $_SERVER
foreach ($_SERVER as $key => $value) {
  if (strpos($key, "HTTP_") !== false) {
    $httpHeaders = $httpHeaders.$key." ".$value."\n";
  }
}
$result_1 = $provider->getMatch($httpHeaders);
printArrayToTable($result_1, $properties, $isPattern, 2);


/**
 * Function prints the contents of a supplied array as a table.
 * @param $array is the array to print out. Mandatory.
 * @param $colNames a one dimensional array that contains names of columns. Optional.
 *      Default values will be used if parameter not provided.
 */
function printArrayToTable($match, $properties, $isPattern, $occurance, $colNames=array("Property","Value","Data Type")) {
    // Columns in the array.
    $columnsInTable = count($colNames);
    // Extra column for the button.
    $columnsInArrayWithButton = $columnsInTable + 1;
    // Number of rows for properties.
    // Id, Rank, Method and Difference are not displayed in the properties
    // section, so we need less rows.
    // Default is for Trie and Trie only provides Id.
    $propertiesRows = count($properties) + 2;
    // Number of Match Metrics rows. Pattern provides more metrics stats.
    $metricsRowspan = 2;
    if ($isPattern) {
        // Pattern provides more metrics than Trie, hence more rows.
        $metricsRowspan = 5;
    }

    echo "<table>";
    echo "<tbody>";

    // Print metrics section.
    echo "<tr>";
    echo "<th colspan='".$columnsInTable."'>Match Metrics</th>";
    // Print 'About metrics' button.
    echo "<th rowspan='".$metricsRowspan."'>";
    $link = getWebsiteLink("metrics", $isPattern, $occurance);
    echo "<a class='button' target='_blank' href='".$link."'>About Metrics</a>";
    echo "</th>";
    echo "</tr>";
    //Print device Id.
    echo "<tr>";
    echo "<td>Id</td>";
    if (NULL !== $match->getDeviceId()) {
        //For Trie Id is an optional property. May not necessarily be set.
        echo "<td>".$match->getDeviceId()."</td>";
        echo "<td>".gettype($match->getDeviceId())."</td>";
    } else {
        echo "<td>N/A</td>";
        echo "<td>N/A</td>";
    }
    echo "</tr>";
    if ($isPattern) {
        //Print detection method.
        echo "<tr>";
        echo "<td>Method</td>";
        echo "<td>".$match->getMethod()."</td>";
        echo "<td>".gettype($match->getMethod())."</td>";
        echo "</tr>";
        //Difference.
        echo "<tr>";
        echo "<td>Difference</td>";
        echo "<td>".$match->getDifference()."</td>";
        echo "<td>".gettype($match->getDifference())."</td>";
        echo "</tr>";
        //Rank.
        echo "<tr>";
        echo "<td>Rank</td>";
        echo "<td>".$match->getRank()."</td>";
        echo "<td>".gettype($match->getRank())."</td>";
        echo "</tr>";
    }

    //Print column names
    //Print Device properties header
    echo "<tr>";
    echo "<th colspan='".$columnsInTable."'>Device Properties</th>";
    echo "<th rowspan='".$propertiesRows."'>";
    $link = getWebsiteLink("properties", $isPattern, $occurance);
    echo "<a class='button' target='_blank' href='".$link."'>More Properties</a>";
    echo "</th>";
    echo "</tr>";
    echo "<tr>";
    foreach($colNames as $key) {
      echo "<td>$key</td>";
    }
    echo "</tr>";
    //Print table contents.

    if ($properties != NULL) {
        //Dataset was in fact initialised with a list of properties.
        foreach($properties as $value) {
            //Ignore Rank, Id, Method and Difference as they are printed elsewhere.
            if ($value === "SignatureRank" || $value === "Rank" ||
                $value === "Difference" || $value === "Method" || $value ==="Id") {
                continue;
            }
            echo "<tr>";
            echo "<td><a href='https://51degrees.com/resources/property-dictionary#$value'>$value</a></td>";
            if ($match->getValue($value) != NULL) {

                echo "<td>".$match->getValue($value)."</td>";
            } else {
                echo "<td><a href='https://51degrees.com/compare-data-options'>Switch Data Set</a></td>";
            }
            echo "<td>".gettype($match->getValue($value))."</td>";
            echo "</tr>";
        }
    } else {
        //NULL was provided, meaning all properties selected.
        foreach($match->getAvailableProperties() as $key => $value) {
            //Ignore Rank, Id, Method and Difference as they are printed elsewhere.
            if ($key === "SignatureRank" || $key === "Rank" ||
                $key === "Difference" || $key === "Method" || $key ==="Id") {
                continue;
            }
            echo "<tr>";
            echo "<td><a href='https://51degrees.com/resources/property-dictionary#$key'>$key</a></td>";
            echo "<td>".$value."</td>";
            echo "<td>".gettype($value)."</td>";
            echo "</tr>";
        }
    }
    echo "</tbody>";
    echo "</table>";
}

/**
 * Function prints information related to the data file currently in use.
 */
function printInfoTable($provider, $isPattern) {
    //How many columns will be required.
    $columns = 3;

    echo "<table>";
    echo "<tbody>";

    echo "<tr>";
    echo "<th colspan='$columns' class='fod_table_header'>Data Set Information</th>";
    echo "</tr>";

    //Print dataset initialisation message.

    //Third column spans all rows and is used to print 'Compare Data Options' button.
    if ($columns == 3) {
        echo "<td rowspan='6'>";
        $link = getWebsiteLink("compare", $isPattern);
        echo "<a class='button' target='_blank' href='".$link."'>Compare Data Options</a>";
        echo "</td>";
    }
    echo "</tr>";

    //Print dataset Published date. Pattern only.
    echo "<tr>";
    echo "<td>Dataset published:</td>";
    if ($isPattern) {
        echo "<td>".$provider->getDataSetPublishedDate()."</td>";
    } else {
        echo "<td>Not available for Trie.</td>";
    }
    echo "</tr>";
    //Print dataset next update date. Pattern only.
    echo "<tr>";
    echo "<td>Dataset next update:</td>";
    if ($isPattern) {
        echo "<td>".$provider->getDataSetNextUpdateDate()."</td>";
    } else {
        echo "<td>Not available for Trie.</td>";
    }
    echo "</tr>";
    //Print dataset version. Pattern only.
    echo "<tr>";
    echo "<td>Dataset version:</td>";
    if ($isPattern) {
        echo "<td>".$provider->getDataSetFormat()."</td>";
    } else {
        echo "<td>Not available for Trie.</td>";
    }
    echo "</tr>";
    //Print dataset name. Exists for both Pattern and Trie. Both Pattern and Trie.
    echo "<tr>";
    echo "<td>Dataset name:</td>";
    echo "<td>".$provider->getDataSetName()."</td>";
    echo "</tr>";
    //Print device combinations. Pattern only.
    echo "<tr>";
    echo "<td>Dataset device combinations:</td>";
    if ($isPattern) {
        echo "<td>".$provider->getDataSetDeviceCombinations()."</td>";
    } else {
        echo "<td>Not available for Trie.</td>";
    }
    echo "</tr>";

    echo "</tbody>";
    echo "</table>";
}

/**
 * Function prints all relevant headers and values for the relevant HTTP
 * headers that were set in this request.
 */
function printHttpHeaders($array, $name, $headers=array()) {
    if (empty($array)) {
        return null;
    }
    $selective = FALSE;
    if(!empty($headers)) {
        $selective = TRUE;
    }

    echo "<table>";
    echo "<tbody>";

    echo "<tr>";
    echo "<th colspan='2'>Match With $name</th>";
    echo "</tr>";

    foreach ($array as $value) {
        if ($selective) {
            //Only some headers are required.
            //If current header not in the array of required headers skip.
            if (!in_array("HTTP_".strtoupper(str_replace("-","_",$value)), $headers)) {
                continue;
            }
        }
        echo "<tr>";
        echo "<td>";
        echo $value;
        echo "</td>";
        echo "<td>";
        if ($_SERVER["HTTP_".strtoupper(str_replace("-","_",$value))] != NULL) {
            echo $_SERVER["HTTP_".strtoupper(str_replace("-","_",$value))];
        } else {
            echo "<i>header not set</i>";
        }
        echo "</td>";
        echo "</tr>";
    }

    echo "</tbody>";
    echo "</table>";
}

/**
 * Function generates a link to 51Degrees based on the purpose of the link, whether
 * the detector is operating in Pattern or Trie modes and if the link is created for
 * the match with User-Agent function or the Match with Headers function. Guaranteed
 * to return a link, even if the parameter is not known.
 * @returns a link to 51Degrees.com
 */
function getWebsiteLink($purpose, $isPattern, $occurance=1) {
    $url = "https://51degrees.com";
    $utmSource = "utm_source=Github";
    $utmMedium = "utm_medium=repository";
    $utmContent = "example_trie";
    if($isPattern) {
        $utmContent = "example_pattern";
    }
    $utmCampaign = "utm_campaign=php-open-source";
    if ($purpose === 'image') {
        $url = "https://51degrees.com/DesktopModules/FiftyOne/Distributor/Logo.ashx";
    } else if ($purpose === 'metrics') {
        $url = "https://51degrees.com/support/documentation/howdevicedetectionworks/trie";
        if ($isPattern) {
            $url = "https://51degrees.com/support/documentation/pattern";
        }
        if ($occurance == 2) {
            $utmContent .= "_header";
        } else {
            $utmContent .= "_ua";
        }
    } else if ($purpose === 'compare') {
        $url = "https://51degrees.com/compare-data-options";
        $utmContent .= "_compare";
    } else if ($purpose === 'properties') {
        $url = "https://51degrees.com/resources/property-dictionary";
        if ($occurance == 2) {
            $utmContent .= "_properties_header";
        } else {
            $utmContent .= "_properties_ua";
        }
    }
    return $url."?".$utmSource."&".$utmMedium."&".$utmContent."&".$utmCampaign;
}
Full Source File
Summary

In this tutorial you have seen how to use the detector in the context of a simple server to retrieve various properties from both a single User-Agent header and multiple HTTP headers. For a full list of properties and the data files they exist in please see the Property Dictionary .
What's Covered

Code and Explanation

Summary

More Tutorials
