Php

competency

http://www.techinterviews.com/php-interview-questions-and-answers

http://responsivewebsitepro.com/cv/ProveItPHP5TestResults.pdf

http://www.odesk-tests.net/odesk-test-answers/web-development/php-test-answers-2015.html

http://www.w3schools.com/php/php_quiz.asp

http://terrychay.com/article/php-coders.shtml

http://testsolutionok.blogspot.com/p/blog-page_19.html

http://world-earn-news.blogspot.com/p/odesk-php-5-test-answers.html

http://devaprai.blogspot.com/2014/12/php-frontend-developer-test-v2-answer.html

http://www.odesk-answers.com/php-test-2015/

php frameworks TDD and BDD

• microframeworks tutorial
• Service sent events

Curl

http://wiki.uniformserver.com/index.php/PHP_cURL:_GET_%26_POST

best practices

https://phpbestpractices.org/

bits of code I always forget

combining $key $val into WHERE str

<syntaxhighlight> <?php $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");

function array2where($arr){ $str="\n\nWHERE "; foreach($arr as $key=>$val){ $str= $str."`$key`=\"$val\" AND "; } $str=substr($str,0,-4); return $str; } echo(array2where($fruits)); ?> WHERE `d`="lemon" AND `a`="orange" AND `b`="banana" AND `c`="apple" </syntaxhighlight>

howto - change an object to an array

<syntaxhighlight> $thefile=file_get_contents("php://input"); echo $thefile; $json = $thefile; $return_obj->setJson($json); //the true parameter forces it to decode to array instead of object //$thearr = (array) json_decode($thefile) only converts the outer object $thearr = json_decode($thefile,true); </syntaxhighlight>

howto - read command line arguments

<syntaxhighlight lang="php"> <?php echo count($argv); if (count($argv)<2){ //if no command line argument echo("script requires command line argument with name of db to backup"); exit(); } $db = $argv[1]; ?> </syntaxhighlight>

howto - MYSQL -> JSON PDO

<syntaxhighlight> $sth = mysql_query("SELECT ..."); $rows = array(); while($r = mysql_fetch_assoc($sth)) {

   $rows[] = $r;

} print json_encode($rows); </syntaxhighlight> or better from rwky <syntaxhighlight> <?php $pdo=new PDO("mysql:dbname=database;host=127.0.0.1","user","password"); $statement=$pdo->prepare("SELECT * FROM table"); $statement->execute(); $results=$statement->fetchAll(PDO::FETCH_ASSOC); $json=json_encode($results); ?> </syntaxhighlight> as in http://stuff2get.sitebuilt.net/services/getfoodlist.php?repo=tpn&list=groceries&need=1 which gets you:

{"items":[{"stuff":"Blueberries imported or domestic org.","id":"430"},{"stuff":"Rasberries","id":"992"},{"stuff":"Strawberries, org","id":"420"},{"stuff":"Teccino herbal. Coffee, original","id":"876"},{"stuff":"Unsweetened almond milk","id":"110"}]}

<syntaxhighlight> $repo = $_GET['repo']; $list = $_GET['list']; $need = $_GET['need']; ChromePhp::log("stuff="); $sql = "SELECT stuff, id FROM `lists` WHERE repo=? AND list=? AND need=? ORDER BY stuff"; try { $dbh = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $stmt = $dbh->prepare($sql); $stmt->execute(array($repo, $list, $need)); $needlist = $stmt->fetchAll(PDO::FETCH_OBJ); $dbh = null; echo '{"items":'. json_encode($needlist) .'}'; } catch(PDOException $e) { echo '{"error":{"text":'. $e->getMessage() .'}}'; } </syntaxhighlight>

howto - PDO insert

<syntaxhighlight> array( "title"=>$title "userid"=>$userid "post"=>$body ) function pdo_insert($table, $arr=array()) {

 if (!is_array($arr) || !count($arr)) return false;

 // your pdo connection
 $dbh  = '...';
 $bind = ':'.implode(',:', array_keys($arr));
 $sql  = 'insert into '.$table.'('.implode(',', array_keys($arr)).') '.
         'values ('.$bind.')';
 $stmt = $dbh->prepare($sql);
 $stmt->execute(array_combine(explode(',',$bind), array_values($arr)));

} pdo_insert($table, array('title'=>$title, 'userid'=>$user_id, 'post'=>$body)); </syntaxhighlight>

from phpeveryday <syntaxhighlight> <?php // configuration $dbtype = "sqlite"; $dbhost = "localhost"; $dbname = "test"; $dbuser = "root"; $dbpass = "admin"; // database connection $conn = new PDO("mysql:host=$dbhost;dbname=$dbname",$dbuser,$dbpass); // new data $title = 'PHP Security'; $author = 'Jack Hijack'; // query $sql = "INSERT INTO books (title,author) VALUES (:title,:author)"; $q = $conn->prepare($sql); $q->execute(array(':author'=>$author,

                 ':title'=>$title));

?> </syntaxhighlight>

howto - see if a character is in a string

you need the ! to test if $somechar==";" (strcmp returns 0 if true)

• if(!strcmp($somechar, ";")) {

as seen in assess/wikiquiz/wikivo2db.php

to get from text area w/o losing linebreaks

• $apage=nl2br(stripslashes($_POST[apage]));

to iterate through the lines in a string

• foreach (preg_split("/(\r?\n)/", $apage) as $line)

howto - populate multi-dimensional arrays

/*multi-dimensional arrays */
$a = array();
$a[0][0] = "a";
$a[0][1] = "b";
$a[1][0] = "y";
$a[1][1] = "z";

$firephp->log($a, 'nearrtest');

misc

assoc array

   $car["weight"] = "100kg"; 
   $car["year"] = "2004"; 
   $car["price"] = "7000"; 
   $car["discount rebate"] = "12";

multidimensional array

hosted/vocab/quiz/db2egg.php: uses multidimensional arrays

does sorting

• parsemeta.php
• txt2flp.pl
• parsephr.php

refs

get meta tag function

[http://sitebuilt.net/w/index.php?title=Comp&action=edit&section=9 authentication script