PHP - Php Reading Certain $_get Differently

A few months ago, and a good amount of time before that, I had people telling me to use isset() instead of performing to see if the variable is empty, such as: !$_GET['']

I know the differences in the function and what they do, but when could isset() be used in a situation where it's better/more efficient then: !$_GET['']

I do use isset(), though.

At the moment I have:

$month_end_date[$surgeryinvoicescount]=$i[0]; = 2011-04-13

I would like

$month_end_date[$surgeryinvoicescount]=$i[0]; = 13/04/2011

I have tried the following but didn't work?!:

$month_end_date = date('d/m/Y',strtotime($month_end_date));
$month_end_date[$surgeryinvoicescount]=$i[0];

I have a problem with formating the appearance of a die statement.
As you will see from the css below, p.form and p.passed both have the same text-align, and marginal values,
however they display very differently.  P.passed is used in an echo, and P.form is used in a die.
I want to display both my echo and die statements in the same place.  Ive tried the obvious and played around with the margins on P.form but it doesnt seem to make any difference.  I can only presume that my die statement is ignoring the class im assigning it?

P.form
{
   color:#FF03;
   margin-left:100px;
   text-align:left;
   clear:both;
}
P.passed
{
   color:#333;
   margin-left:100px;
   text-align:left;
   clear:both;
}

Code: [Select]
<?php // snippet

if($Name == '')
{
die ("<P class=\"form\">You did not complete the name field, please try again</p>");
}
elseif  ($Phone == '' or (preg_match("/^([1]-)?[0-9]{3}-[0-9]{3}-[0-9]{4}$/i", $Phone)))
{
die('<P class="form"> You completed the telephone field incorrectly, please try again</p>');
}
elseif  ($Email == '' or (!filter_var($Email, FILTER_VALIDATE_EMAIL)))
{
die('<P class="form"> You completed the Email field incorrectly, please try again</p>');
}    
elseif  ($Postcode == '' or (!checkPostcode($Postcode)))
{
die('<P class="form"> You did not complete the Postcode field correctly, please try again</p>');
}   
elseif  ($Website == '' or (!preg_match("~^[a-z0-9.-]+\.(com|org|net|edu|co.uk)~i", $Website)))
{   
die('<P class="form">You completed the website field incorrectly, please try again</p>');
}
else
{
echo("<P class=\"passed\">Thankyou for submiting your details, you will be added to our directory shortly</p>");
}}
Ive formatted if and else slightly differently but the output is still the same.
Should die statements and echo's display differently?

I've been doing some benchmarking for memory usage for a very resource-sensitive project I'm doing (that I probably shouldn't be using PHP for, but oh well). I came across something peculiar, and I'm trying to figure out why I get results as I do.

Here is my test file:

<?php
$string_parts = 4;
$max = 10000;
$arr = array();
$i = 0;
$start = memory_get_usage();
for(;$i<$max;$i++){
$arr[] = array_pad(array(), 4, "A");
}
$end = memory_get_usage();
printf("%d iterations, %d bytes in array\n", $max, $end-$start);

$arr2 = array();
$i = 0;
$start2 = memory_get_usage();
for(;$i<$max;$i++){
$arr2[] = array("A", "A", "A", "A");
}
$end2 = memory_get_usage();
printf("%d iterations, %d bytes in array (%.2f%%)\n", $max, $end2-$start2, ($end2-$start2)/($end-$start)*100);
?>


Output on my system:
Code: [Select]
10000 iterations, 4145696 bytes in array
10000 iterations, 5585744 bytes in array (134.74%)
A 35% memory gain for two of the same exact arrays seems really weird. Any information as to why, or perhaps any useful functions or resources would be appreciated.

but never on the first call.  Okay, I posted this on StackOverflow but no one there seems to have an answer either.  I have this simple function:

Code: [Select]
public function delete($messageID) {
$type = $this->findType($messageID);
if ($type == 'in') {
foreach ($this->inArr as $key => $value) {
if ($this->inArr[$key]->messageID != $messageID)
$implodeData[$key] = $this->inArr[$key]->messageID;
}
if (!isset($implodeData))
$imploded = '0';
else
$imploded = implode(',', $implodeData);
$result = $this->_database->updatePMUser('inArr', $imploded, 'UID', $this->UID);
$result2 = $this->_database->deletePM('messageID', $messageID);
return;
}
else {
foreach ($this->sentArr as $key => $value) {
if ($this->sentArr[$key]->messageID != $messageID)
$implodeData[$key] = $this->sentArr[$key]->messageID;
}
if (!isset($implodeData))
$imploded = '0';
else
$imploded = implode(',', $implodeData);
$result = $this->_database->updatePMUser('sentArr', $imploded, 'UID', $this->UID);
$result2 = $this->_database->deletePM('messageID', $messageID);
return;
}
}
It is a delete function for a private messaging program for a forum script I'm writing.  Anyway, here's the issue - it works!  But only sometimes.  It is called in 3 different places, always from a form processing class I have, once in the view message section to delete a message you're viewing, in a foreach from the sentbox options section and then a foreach in the inbox options section.  The inbox and sentbox option sections do that whole "delete the checked messages" for the mass removal functionality.  The delete function above works in all ways shapes and forms when I use it in single calls - like when I'm deleting a message while viewing it or when I only check one message from the inbox, etc - but when I call it multiple times (as in I have checked multiple messages) - it fully deletes one (both the message and the reference to the message in the user's db row) and then only deletes the actual message on the others (deleting the message is the call to deletePM - deleting the reference is the call to updatePMUser).

Okay, if you need further information - the function above checks the type the message is (in the inbox or in the sentbox) and then uses that to foreach through that array (inArr or sentArr) of the user.  It logs in all the messageIDs of the those that DON'T match the one we're deleting and then at the end it implodes those caught IDs into a string that is then updated in the user's row as a comma separated string of values each representing a message in the DB - you get the picture.  I realize I have some trimming to do (for one I can cut the above function down by about half by using variable variables) but I'll get to that after I get the thing working.  I can't figure out why it's doing what it's doing.  If you need the function that calls this in the foreach, I have it below.  Oh, and the thing that really boggles me is that this function is called fully for each checked message in the foreach - it fully returns and then loops - if it works once, I don't see how it wouldn't work on a second call from a loop - the variables it uses should be trashed when it leaves the function, they aren't global or object properties or anything.  Color me confused.

Thanks for any help, oh, here's one of the functions that calls it to delete checked messages (this one is for the sentbox, there is another for the inbox):

Code: [Select]
private function _processSelectedSent() {
$pmObj = unserialize(base64_decode($_POST['pmObj']));
$i=1;
foreach ($_POST as $key => $value) {
if ($value == 'marked') {
$checkedArray[$i] = $key;
$i++;
}
}
if ($_POST['submitter'] == 'Delete Selected') {
if (is_array($checkedArray)) {
foreach ($checkedArray as $key => $value)
$pmObj->delete($value);
}
else
$pmObj->delete($checkedArray[1]);
header("Location: ".HOME_PAGE.PM_PAGE."?view=sentbox&nocache=".time());
}
}