Updates from PHP8 course

examples/core_lab_oop_diffs.php

@@ -3,18 +3,16 @@
 ini_set('display_errors', 1);
 ini_set('error_reporting', E_ALL & ~E_DEPRECATED);
 define('SRC_DIR', __DIR__ . '/../labs/oop_diffs/src');
-$autoload = function ($class) {
-	$fn = SRC_DIR . '/'
-		. str_replace('\\', '/', $class)
-		. '.php';
-	require_once $fn;
-};
 $data = ['A' => [1,2,3],'B' => [4,5,6],'C' => [7,8,9]];
 try {
-	spl_autoload_register('autoload', TRUE);
-} catch (Exception $e) {
 	include SRC_DIR . '/Loader.php';
+	$loader = new Loader(SRC_DIR);
+	spl_autoload_register('Loader');
+} catch (Exception $e) {
+	include SRC_DIR .'/autoload.php';
 }
-$response = new Response($data);
-echo 'JSON Response: ' . $response->render();
-
+use Application\Strategy\JsonResponse;
+$response = new JsonResponse();
+$response->one = $data;
+echo 'Version       : ' . $response::version();
+echo "\nJSON Response : {$response->one}\n";

examples/core_lab_proc_diffs.php

@@ -0,0 +1,29 @@
+<?php
+// core_lab_proc_diffs.php
+ini_set('display_errors', 0);
+define('SRC_DIR', __DIR__ . '/../labs/proc_diffs');
+define('ERR_AGE', 'Invalid Age');
+define('ERR_ZERO', 'Zero');
+
+// validate staff
+$data = include SRC_DIR . '/staff.php';
+foreach ($data as $key => $row) {
+        $err = '';
+        if (!is_numeric($row{2})) {
+                $err  = ERR_AGE;
+        }
+        if ($row{2} == 0) {
+                $err .= ' ' . ERR_ZERO;
+        }
+        $row[] = trim($err);
+        $row{2} = $row{2} + 1;
+        $data[$key] = $row;
+}
+
+// list employees
+echo "\nCEO: {$data[0][1]}\n";
+echo "ID\tName\tAge\tTitle\tErrors\n";
+foreach ($data as $row) {
+        echo implode($row, "\t") . "\n\t";
+        echo $row[2] + 10 . " is his/her age in 10 years\n";
+}

examples/core_proc_data_wrapper.php

@@ -1,10 +1,20 @@
 <?php
 // core_proc_data_wrapper.php
+// ??? maybe there's a better example ???
 $dsn = 'mysql:host=localhost;dbname=phpcl';
 $pdo = new PDO($dsn, 'phpcl', 'password');
-$stmt = $pdo->query("SELECT * FROM images WHERE title = 'Apple'");
+$stmt = $pdo->query('SELECT * FROM images');
+$titles = [];
+echo '<table>';
+echo '<tr>';
 if ($stmt) {
-	$row = $stmt->fetch(PDO::FETCH_ASSOC);
-	echo $row['title'] . "\n";
-	echo '<img src="' . "data://image/jpeg;base64,{$row['image']}" . '" />';
+	while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
+		$titles[] = $row['title'];
+		echo '<td>'
+			 . '<img src="' . "data://image/jpeg;base64,{$row['image']}" . '" />'
+			 . '</td>';
+	}
 }
+echo '</tr>';
+echo '<tr><th>' . implode('</th><th>', $titles) . '</th></tr>';
+echo '</table>';

examples/core_proc_num_to_str.php

@@ -5,11 +5,11 @@
 $mixed  = '42abc';
 $array  = ['A','B','C'];
 
-$result = ($value == $string) ? 'is the same as' : 'is not the same as';
+$result = ($value == $string) ? 'is the same as' : 'is NOT the same as';
 echo 'The value "' . $value . '" ' . $result . ' "' . $string. "\"\n";
 
-$result = (in_array($value, $array)) ? 'is in' : 'is not in';
+$result = (in_array($value, $array)) ? 'is in' : 'is NOT in';
 echo 'The value "' . $value . '" ' . $result . "\n" . var_export($array, TRUE);
 
-$result = ($mixed == 42) ? 'is the same as' : 'is not the same as';
+$result = ($mixed == 42) ? 'is the same as' : 'is NOT the same as';
 echo "\n" . 'The value "' . $mixed . '" ' . $result . " 42\n";

examples/core_proc_numeric_strings.php

@@ -1,16 +1,18 @@
 <?php
 // core_proc_numeric_strings.php
 $test = ['111', '  111', '111  ', '111doug'];
-foreach ($test as $numStr) 
-	var_dump((int) $numStr);
 function test(float $i) { 
-	return var_export($i, TRUE);
+	return var_export($i, TRUE) . "\n";
 }
-foreach ($test as $numStr) {
-	test($numStr);
-	echo "\n";
+try {
+	foreach ($test as $numStr) test($numStr);
+} catch (Throwable $t) {
+	echo $t;
 }
-foreach ($test as $numStr) {
-	var_dump(111 + $numStr);
-	echo "\n";
+
+try {
+    foreach ($test as $numStr)
+		var_dump(111 + $numStr, TRUE);
+} catch (Throwable $t) {
+	echo $t;
 }

examples/core_proc_serialize.php

@@ -0,0 +1,31 @@
+<?php
+// core_proc_serialize.php
+define('TARGET_DIR', __DIR__ . '/data');
+class Test
+{
+	public $arr = [];
+	public $obj1 = NULL;
+	public $obj2 = NULL;
+}
+
+// build up object
+$arr  = ['A' => 111, 'B' => 222, 'C' => 333];
+$test = new Test();
+$test->arr = $arr;
+$test->obj1 = new ArrayObject($arr);
+$test->obj3 = new ArrayIterator($arr);
+
+// store serialized version based on PHP vers
+$phpFile = TARGET_DIR . '/serial_' . PHP_VERSION . '.txt';
+$str = serialize($test);
+echo $str . "\n";
+file_put_contents($phpFile, $str);
+
+// unserialize all files in TARGET_DIR
+$list = glob(TARGET_DIR . '/serial_*');
+foreach ($list as $fn) {
+	$restored = file_get_contents($fn);
+	$obj = unserialize($restored);
+	echo "\n" . basename($fn) . "\n";
+	var_dump($obj);
+}

examples/data/README.md

@@ -0,0 +1,3 @@
+# Placeholder
+
+This directory exists for examples to write temporary data.

index.php

@@ -16,7 +16,7 @@
 	'proc' => 'Procedural PHP',
 	'ext'  => 'PHP Extensions',
 	'error' => 'Error Handling',
-	'labs' => 'Labs',
+	'lab' => 'Labs',
 ];
 // output file list
 if (empty($message)) $message = '';

labs/oop_diffs/src/Application/Strategy/JsonResponse.php

@@ -1,14 +1,22 @@
 <?php
-namespace Application\Strategy;
+namespace Application\ Strategy;
 class JsonResponse
 {
-	public function jsonresponse($data = []) 
+	use VersionTrait;
+	const VERSION = '1.0';
+	protected $internal = [];
+	public function __set($key, $value) 
 	{
-		$this->data = $data;
+		$this->internal[$key] = $value;
 	}
-	public function render()
+	public function __get($key) : string
 	{
-		header('Content-Type: application/json');
-		return json_encode($this->data);
+		$json = $this->internal[$key] ?? [];
+		return json_encode($json);
+
+	}
+	public function version() : string
+	{
+		return self::VERSION;
 	}
 }

labs/oop_diffs/src/Application/Strategy/VersionTrait.php

@@ -0,0 +1,6 @@
+<?php
+namespace Application\ Strategy;
+trait VersionTrait
+{
+	public abstract function version(int $num) : int;
+}

labs/oop_diffs/src/Loader.php

@@ -1,13 +1,16 @@
 <?php
 class Loader
 {
+	protected $dir = '';
+	public function loader($dir)
+	{
+		$this->dir = $dir;
+	}
 	public function __invoke($class) 
 	{
-		$fn = SRC_DIR . '/'
+		$fn = $this->dir . '/'
 			. str_replace('\\', '/', $class)
 			. '.php';		
 		require_once $fn;
 	}
 }
-$loader = new Loader();
-spl_autoload_register($loader);

labs/oop_diffs/src/autoload.php

@@ -0,0 +1,8 @@
+<?php
+function __autoload($class)
+{
+	$fn = SRC_DIR . '/'
+		. str_replace('\\', '/', $class)
+		. '.php';		
+	require_once $fn;
+}

labs/proc_diffs/staff.csv

@@ -0,0 +1,4 @@
+1	Andrew	32	CEO
+2	Doug	63doug	CTO
+3	Andree-Anne	  28	Senior DevOp
+4	Nicole	46  	Partner

labs/proc_diffs/staff.php

@@ -0,0 +1,9 @@
+<?php
+return [
+	-2 => [5,'James','thirty','Mktg'],
+	[1,'Andrew','32','CEO'],
+	[2,'Doug','63doug','CTO'],
+	[3,'Anne','  28','DevOp'],
+	[4,'Nicole','46  ','Partner'],
+	[6,'Fred','999','Caveman'],
+];