PHP – Page 2 – Compilation

Getting multiple checkbox values in PHP

November 4, 2014 The Compilator PHP

If you give the checkboxes the same name, ending in [], the values are returned as an array.

<input type="checkbox" name="fruit[]" value="apple" />
<input type="checkbox" name="fruit[]" value="grapefruit" />

1 2	<input type="checkbox" name="fruit[]" value="apple" /> <input type="checkbox" name="fruit[]" value="grapefruit" />

Then in PHP …

if( isset($_POST['fruit']) && is_array($_POST['fruit']) ) {
foreach($_POST['fruit'] as $fruit) {
echo "I have a {$fruit}!";
}
$fruitList = implode(', ', $_POST['fruit']);
}

if( isset($_POST['fruit']) && is_array($_POST['fruit']) ) {

foreach($_POST['fruit'] as $fruit) {

echo "I have a {$fruit}!";

}

$fruitList = implode(', ', $_POST['fruit']);

}

Magic object functions in PHP

August 12, 2014 The Compilator PHP

There are special built-in functions for objects as the constructor. They all start with “_”. one of them is _call which is called when an

Default argument values in function declaration

July 23, 2014 The Compilator PHP

A function may define C++-style default values for scalar arguments as follows: Example #3 Use of default parameters in functions

<?php
function makecoffee($type = "cappuccino")
{
return "Making a cup of $type.\n";
}
echo makecoffee();
echo makecoffee(null);
echo makecoffee("espresso");
?>

<?php

function makecoffee($type = "cappuccino")

{

return "Making a cup of $type.\n";

}

echo makecoffee();

echo makecoffee(null);

echo makecoffee("espresso");

The above example will

Checking if a function already exists

June 11, 2014 The Compilator PHP, Problem Fixer

Declaring the same function twice will trigger an error message and stop the script. If there is an include with a function but it’s not

File include into a variable

June 11, 2014 The Compilator PHP

There is an easy way to get a file’s content into a variable: $var = file_get_contents($_SERVER[‘DOCUMENT_ROOT’].’/file.php’); Useful when building a variable that holds output (HTML)

using global variables inside a function

May 26, 2014 The Compilator PHP

I used the global declaration and it works. You have to pass it to the function:

&lt;?php
    $sxml = new SimpleXMLElement('&lt;somexml/&gt;');

    function foo($sxml){
        $child = $sxml-&gt;addChild('child');
    }

    foo($sxml);
?&gt;

<?php

$sxml = new SimpleXMLElement('<somexml/>');

function foo($sxml){

$child = $sxml->addChild('child');

}

foo($sxml);

or declare it global:

&lt;?php
    $sxml = new SimpleXMLElement('&lt;somexml/&gt;');

    function foo(){
        global $sxml;
        $child = $sxml-&gt;addChild('child');
    }

    foo();
?&gt;

<?php

$sxml = new SimpleXMLElement('<somexml/>');

function foo(){

global $sxml;

$child = $sxml->addChild('child');

}

foo();

If the variable isn’t

Passing values from PHP to JavaScript / jQuery

May 13, 2014 The Compilator PHP

function getTarget() {
    var targetParam = "&lt;?php  echo $_GET['target'];  ?&gt;";
    alert(targetParam);
}

function getTarget() {

var targetParam = "<?php echo $_GET['target']; ?>";

alert(targetParam);

}

Remembering form values after submit

May 13, 2014 The Compilator PHP

Text field: <input type=”text” name=”Fname” value=”<?php echo isset($_POST[‘Fname’]) ? $_POST[‘Fname’] : ” ?>” > Radio button: <input type=”radio” value=”Fvalue” name=”field_name” <?php if(isset($_POST[‘field_name’]) && $_POST[‘field_name’] == ‘Fvalue’)

@ sign in functions

May 5, 2014 The Compilator PHP

It suppresses error messages: PHP supports one error control operator: the at sign (@). When prepended to an expression in PHP, any error messages that

CDATA

May 5, 2014 The Compilator PHP, XML

CDATA – (Unparsed) Character Data The term CDATA is used about text data that should not be parsed by the XML parser. Characters like “<”

Working with XML files

May 5, 2014 The Compilator PHP, XML

http://www.w3schools.com/php/func_simplexml_load_file.asp Built in function to get an object with an XML content. Useful for language independent interfaces.

Require vs. include – for _once and for all

March 11, 2014 The Compilator PHP

Require has to have the file, if not it gives an error. Include – wants the file, gives a warning if it is not there,

PHP: Send email with all form values/fields

February 17, 2014 The Compilator PHP

if (isset($_POST[‘Submit’])) { // Prepare message $msg = “Time: ” . date(“d/m/y g:ia”, time()) . “\n”; foreach ($_POST as $field=>$value) { if ($field != “submit”) $msg .= $field . “: ” . $value . “\n”; } if (mail(“EMAIL”, “SUBJECT”, $msg, “From: FROM_NAME <[email protected]>”)) { // Email was sent successfully } else {

PHP changing table collation (encoding) from latin_swedish (or any other) to UTF-8

February 10, 2014 The Compilator PHP

<?php $server = “localhost”; $user=”user_details”; $pw=”password”; $db=”111111_database”; mysql_connect(“$server”,”$user”,”$pw”) or die (“could not connect to mysql”); mysql_select_db($db) or die (“could not find Database”); mysql_query(“SET CHARACTER SET

PHP Associative Arrays

November 4, 2013 The Compilator PHP

Associative arrays are arrays that use named keys that you assign to them. There are two ways to create an associative array: $age=array(“Peter”=>”35″,”Ben”=>”37″,”Joe”=>”43”); or: $age[‘Peter’]=”35″;