PHP - Scope Of Variables In If Statements

I need a bit of help understanding the scope of variables

If I have the following code:

Code: [Select]
<?php
$myvar = true;

include(otherfile.php);
?>

Is $myvar available for access as is in the code from otherfile.php?

Specifically though, I'm trying to get my head round some Wordpress coding, so I have this instead:


Code: [Select]
<?php
$myvar = true;

<?php get_header(); ?>
?>

<?php get_header(); ?> puts the contents of header.php at this location + I'm sure it does some other things like error checking etc

What is the best way to have $myvar available?
The ONLY thing is I only want $myvar = true just for one file - everywhere else it should be false or not exist

I'm wary of using a global variable - but if it's the only way, then I have to

Thanks


Omar

I have some questions about the scope of navigation :

if i define a constant like define('constant'), php manuel says it's global,

does this mean that i can use of different files also? like, i defined in define.php and used in anotherfile.php, or shoud the latter file be included then?

what about file

a.php includes file b.php which in turn includes file c.php. Can functions of a use variables of file c?

ultimately:

what about variables that are declared global inside a function but this variables is not initialized in that script, like in wordpress:

function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
   global $wp_locale;

// more code

}

$wp_locale can be initialized in another script file?

thanks in advance

Hello all,

I have a 14 column csv that I load into an array, retrieving only the required fields, load the array into columns and perform a sort:
Code: [Select]
foreach ($array as $key => $row) {
$firstname[$key] = $row["firstn"];
    $lastname[$key] = $row["lastn"];
    $address1[$key] = $row["addr1"];
    $address2[$key] = $row["addr2"];
    $address3[$key] = $row["addr3"];
$city[$key] = $row["cit"];
$stateprov[$key] = $row["state"];
$country[$key] = $row["cntry"];
$membernumber[$key] = $row["num"];}
array_multisort($membernumber,$lastname,$firstname,$address1,$address2,$address3,$city,$stateprov,$country,$array);When I pass say the first three letters of a last name ($find = "smi"), all records matching the search criteria are returned:
Code: [Select]
foreach ($array as $key => $row) {
if (strncasecmp($find, $lastname[$key], strlen($find)) == 0) {
echo "<tr><td>" . $firstname[$key] . "</td>";
echo "<td>" . $lastname[$key] . "</td>";
echo "<td>" . $address1[$key] . "</td>";
echo "<td>" . $address2[$key] . "</td>";
echo "<td>" . $address3[$key] . "</td>";
echo "<td>" . $city[$key] . "</td>";
echo "<td>" . $stateprov[$key] . "</td>";
echo "<td>" . $country[$key] . "</td>";
echo "<td>" . $membernumber[$key] . "</td></tr>" . chr(13);
}}}So far so good. However, I'd like to put the search part into a function so I can call it a number of times without having to reload the entire csv:
Code: [Select]
function FindMember() {
foreach ($array as $key => $row) {
if (strncasecmp($find, $membernumber[$key], strlen($find)) == 0) {
echo "<tr><td>" . $firstname[$key] . "</td>";
echo "<td>" . $lastname[$key] . "</td>";
echo "<td>" . $address1[$key] . "</td>";
echo "<td>" . $address2[$key] . "</td>";
echo "<td>" . $address3[$key] . "</td>";
echo "<td>" . $city[$key] . "</td>";
echo "<td>" . $stateprov[$key] . "</td>";
echo "<td>" . $country[$key] . "</td>";
echo "<td align='right'>" . $membernumber[$key] . "</td></tr>" . chr(13);
}}}}The search criteria would come from a second txt file with every line containing 2 numbers, separated by a comma:
Code: [Select]
foreach ($lines as $member => $numbers) {
$exploded = explode(",", $numbers);
$find = $exploded[1];
FindMember();here $exploded[1] corresponds to $membernumber[$key], so this is where I would call the function, but this is where I run into trouble, nothing gets returned.

Does this have something to do with the scope of variables inside a user-defined function?

I'd appreciate it if someone could point me in the right direction.

TIA

Hi, all... have a basic question here as a newbie that I am...

Many times, in some scripts I see (I think, if not mistaken), places where within a echo sentence I see variables echoed like this with no quotes:

echo "First Name: $firstName and Last Name: $lastName"; 
as opposed to like one would expect:
echo "First Name: " . $firstName . " and Last Name: " . $lastName"; 

Sometimes I see that also when variables are used in select/update statements I think.. like this:
$query = mysql_query("SELECT FROM table WHERE column = $columnname");
Instead of like this within quotes:
$query = mysql_query("SELECT FROM table WHERE column = '$columnname'");


Is it because some of these values may be numbers (numeric) as opposed to "strings"??
Not sure if I make sense... appreciate teh feedback,
Thanks!

Hi Guys   I have a question about maintaining scope in OOP.  I may just be going about it in completely the wrong way but I'm here to learn.   Lets say I have a base class called 'first; set out as per the code below.    In the first class there is a method that instantiates another class - called second. This second class extends the first class and I want it to be able to set errors on the first class.  The only way I can maintain it's scope is to pass $this into the constructor of the second class.   My questions a   1) Is this the right way to maintain scope? 2) Would this be bad practice and I should explore a different model for setting out these classes? 3) Would it be considered better practice to make $errors a static property?     Keen to do things the right way so any advice is very welcome

class first {

	public $errors = array();
	
	public function __construct(){
		
		$this->callSecondClass();
		$this->render();
		
	}
	
	public function callSecondClass(){
		
		$t = new second($this);
		
	}

	public function render(){
	
		echo "I am rendering errors:";
		print_r($this->errors);
	}

}

class second extends first {

	
	public function __construct($obj){
			
		$obj->errors[] = 'ERROR FROM SECOND CLASS';
	}

}
 

Edited by Drongo_III, 14 August 2014 - 04:54 PM.