PHP General Problems and Mastering Interview Questions

  Design patterns  are typical solutions to commonly occurring problems in software design. They are like pre-made blueprints that you can customize to solve a recurring design problem in your code The Catalog of Design Patterns Creational Design Patterns These patterns provide various object creation mechanisms, which increase flexibility and reuse of existing code. Structural patterns These patterns explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient. Behavioral patterns These patterns are concerned with algorithms and the assignment of responsibilities between objects. https://refactoring.guru/design-patterns

 $this->Store->id = 28; $data = array(); $data['Store']['store_name'] = "Test Sarab Gen Store"; $this->Store->save($data);

 try {             $url = "http://checkip.amazonaws.com";             $ch = curl_init();             $headers = array(                 'Accept: application/json',                 'Content-Type: application/json',             );             curl_setopt($ch, CURLOPT_URL, $url);             curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);             curl_setopt($ch, CURLOPT_HEADER, 0);             curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);             $result = curl_exec($ch);             $res = json_decode($result,true);                        $ip...

 <?php $testarray = array(4,3,8,5,2,9,7,6); $length =  count($testarray); for($i=0;$i<$length;$i++){ for($j=0;$j<$length-$i-1;$j++){ if ($testarray[$j]>$testarray[$j+1]) { $temp = $testarray[$j]; $testarray[$j] = $testarray[$j+1]; $testarray[$j+1] = $temp; } } } echo "Largest Element == ".$testarray[$length-1+1-1]; echo"<br>"; echo "2nd Largest Element == ".$testarray[$length-2+1-1]; ?> OutPut:- Largest Element == 9 2nd Largest Element == 8

 <?php $duplicate = array(4,8,4,3,8,5,2,4,5,9,7,6,9); $length =  count($duplicate); $unique = array(); foreach($duplicate as $value){ if(!in_array($value,$unique)){ $unique[] = $value; } } echo"<pre>"; print_r($unique); ?> Output:- Array ( [0] => 4 [1] => 8 [2] => 3 [3] => 5 [4] => 2 [5] => 9 [6] => 7 [7] => 6 )

 <?php $string = "i love india"; $rev =  ''; $length = strlen($string); for($i=$length-1;$i>=0;$i--){ $rev .=$string[$i]; } echo $rev; ?> Output:- aidni evol i

<?php $array1 = array(1,2,3,4,5); $array2 = array(6,7,8,9,10); for($i=0;$i<count($array2);$i++){ $array1[] = $array2[$i]; } echo"<pre>"; print_r($array1); ?> Output:-   Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 [9] => 10 )