<?php
/**
* example.php - Image file metadata handing exampe file
*
* @project Holiday\Metadata
* @version 1.1
* @author Claude Diderich ([email protected])
* @copyright (c) 2022 by Claude Diderich
* @license https://opensource.org/licenses/mit MIT
*/
/** Set error handling */
error_reporting(E_ALL);
ini_set('log_errors', false);
ini_set('display_errors', true);
/**
* Automatically load classes
*
* @param string $name Name of class to load
*/
function my__autoload(string $name): void
{
$name = str_replace("\\", '/', str_replace("Holiday\\", '', $name));
if(file_exists("../src/$name.php")) require_once("../src/$name.php");
}
spl_autoload_register('my__autoload');
/*** EXAMPLE ***/
$testfiles_ary = array('img.example.jpg', 'img.mlexample.jpg');
/**
* Use of class Metadata
*/
$metadata = new \Holiday\Metadata();
foreach($testfiles_ary as $filename) {
echo "PROCESSING EXAMPLE IMAGE USING \\Holiday\\Metadata CLASS: $filename".PHP_EOL;
echo "---".PHP_EOL;
// Read metadata in a transparent way not extend tagged keywords
$metadata->read($filename, extend: false);
// Read some of the metadata (assuming metadata is available)
$caption = $metadata->get(\Holiday\Metadata::CAPTION, lang: \Holiday\Metadata::LANG_DEFAULT);
$caption_ary = $metadata->get(\Holiday\Metadata::CAPTION, lang: \Holiday\Metadata::LANG_ALL);
$date_created = $metadata->get(\Holiday\Metadata::CREATED_DATETIME);
$credit = $metadata->get(\Holiday\Metadata::CREDIT);
$city = $metadata->get(\Holiday\Metadata::CITY);
$country = $metadata->get(\Holiday\Metadata::COUNTRY);
$keywords = $metadata->get(\Holiday\Metadata::KEYWORDS);
$people = $metadata->get(\Holiday\Metadata::PEOPLE);
$event = $metadata->get(\Holiday\Metadata::EVENT);
if(!empty($caption_ary)) {
echo "CAPTION:".PHP_EOL;
foreach($caption_ary as $lang => $text) {
$lang = substr($lang.' ', 0, 9);
echo " $lang: $text".PHP_EOL;
}
}
if($credit !== false) echo "CREDIT : $credit".PHP_EOL;
if($city !== false && $country !== false) echo "PLACE : $city, $country".PHP_EOL;
if($date_created !== false) echo "CREATED : ".date('d.m.Y', $date_created).PHP_EOL;
if($event !== false) echo "EVENT : $event".PHP_EOL;
if($keywords !== false) echo "KEYWORDS : ".implode(', ', $keywords).PHP_EOL;
if($people !== false) echo "PEOPLE : ".implode(', ', $people).PHP_EOL;
echo PHP_EOL;
// Read metadata in a transparent way and extend tagged keywords to their respective fields
$metadata->read($filename, extend: true);
echo "EXTENDING KEYWORD TAGS:".PHP_EOL;
$keywords = $metadata->get(\Holiday\Metadata::KEYWORDS);
$people = $metadata->get(\Holiday\Metadata::PEOPLE);
if($keywords !== false) echo "KEYWORDS : ".implode(', ', $keywords).PHP_EOL;
if($people !== false) echo "PEOPLE : ".implode(', ', $people).PHP_EOL;
echo PHP_EOL;
// Re-format caption and update information
if($caption !== false && $date_created !== false && $city !== false && $country !== false && $credit !== false) {
$caption = strtoupper($city).', '.strtoupper($country).' - '.strtoupper(date('F d', $date_created)).': '.
$caption.' (Photo by '.$credit.')';
$metadata->set(\Holiday\Metadata::CAPTION, $caption, lang: \Holiday\Metadata::LANG_DEFAULT);
}
else {
echo "NOT ALL INFORMATION AVAILABLE TO UPDATE CAPTION".PHP_EOL;
}
if($event !== false) {
$metadata->set(\Holiday\Metadata::EVENT, strtoupper($event));
}
else {
$metadata->set(\Holiday\Metadata::EVENT, 'Event was empty');
}
// Write metadata back to the image file
$metadata->write("new.$filename");
// Read-back the data and display modified caption
$metadata->read("new.$filename");
$caption_ary = $metadata->get(\Holiday\Metadata::CAPTION, \Holiday\Metadata::LANG_ALL);
if(!empty($caption_ary)) {
echo "NEW CAPTION:".PHP_EOL;
foreach($caption_ary as $lang => $text) {
$lang = substr($lang.' ', 0, 9);
echo " $lang: $text".PHP_EOL;
}
}
echo "NEW EVENT : ".$metadata->get(\Holiday\Metadata::EVENT).PHP_EOL.PHP_EOL;
// Paste original data to new file
$metadata->read("$filename");
$metadata->paste("new.$filename");
// Read-back the data and display original caption
$metadata->read("new.$filename");
$caption_ary = $metadata->get(\Holiday\Metadata::CAPTION, \Holiday\Metadata::LANG_ALL);
if(!empty($caption_ary)) {
echo "PASTED CAPTION:".PHP_EOL;
foreach($caption_ary as $lang => $text) {
$lang = substr($lang.' ', 0, 9);
echo " $lang: $text".PHP_EOL;
}
}
echo "PASTED EVENT: ".$metadata->get(\Holiday\Metadata::EVENT).PHP_EOL.PHP_EOL;
}
/**
* Use of exception handling class \Holiday\Metadata\Exception
*/
echo PHP_EOL;
try {
$metadata->read('invalid.file.name.jpg');
echo "FILE WAS SUCCESSFULLY READ ALTHOUGH IT SHOULD NOT EXIST".PHP_EOL;
}
catch(\Holiday\Metadata\Exception $exception) {
echo "EXCEPTION CATCHED".PHP_EOL;
echo "---".PHP_EOL;
echo "CODE: ".$exception->getCode().PHP_EOL;
echo "MESSAGE: ".$exception->getMessage().PHP_EOL;
echo "DATA: ".$exception->getData().PHP_EOL;
}
/***
* Cleanup images created
*/
foreach($testfiles_ary as $filename) {
unlink("new.$filename");
}
?>
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