Tryangled Solutions web designing tips tricks

<form method=”post” action=”form.php” autoComplete=”off”>
<input type=”submit” name=”submit” value=”Go!”>
</form>

<?php
$input_array = array(”FirSt” => 1, “SecOnd” => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
The above example will output:
copy to clipboard
Array
(
[FIRST] => 1
[SECOND] => 4
)

It is always a good idea to try and avoid regular expressions, where possible and practical. There are functions in PHP which will do exactly what some regular expressions do, but faster. Take this example:

if(ereg(’[0123456789]‘, $number)) {
// Is integer
}else{
// Is not integer
}

It is much faster to do this instead:

if(ctype_digit($number)) {
// Is integer
}else{
// Is not integer
}

To test this, I used ereg(’[0123456789]‘, $number) 1,000,000 times, followed by using ctype_digit($number) 1,000,000 times. Here are the results:

Regular Expressions: 2.401 seconds
ctype_digit: 0.985 seconds
Time saved: 1.416 seconds; 58.98%

This tutorial will show how to Validate Date fields using PHP code in ‘dd/mm/yyyy’ Format. It is a good practice to validate the date value when it is obtained using forms through user input.

PHP CODE:

//Check whether the submission is made
if(!isset($_POST["hidSubmit"])){
//Declarate the necessary variables
$strdate=”";
$strdate1=”";
DisplayForm();
}
else{
$strdate=$_POST["txtdate"];
//Check the length of the entered Date value
if((strlen($strdate)<10)OR(strlen($strdate)>10)){
echo(”Enter the date in ‘dd/mm/yyyy’ format”);
}
else{
//The entered value is checked for proper Date format
if((substr_count($strdate,”/”))<>2){
echo(”Enter the date in ‘dd/mm/yyyy’ format”);
}
else{
$pos=strpos($strdate,”/”);
$date=substr($strdate,0,($pos));
$result=ereg(”^[0-9]+$”,$date,$trashed);
if(!($result)){echo “Enter a Valid Date”;}
else{
if(($date<=0)OR($date>31)){echo “Enter a Valid Date”;}
}
$month=substr($strdate,($pos+1),($pos));
if(($month<=0)OR($month>12)){echo “Enter a Valid Month”;}
else{
$result=ereg(”^[0-9]+$”,$month,$trashed);
if(!($result)){echo “Enter a Valid Month”;}
}
$year=substr($strdate,($pos+4),strlen($strdate));
$result=ereg(”^[0-9]+$”,$year,$trashed);
if(!($result)){echo “Enter a Valid year”;}
else{
if(($year<1900)OR($year>2200)){echo “Enter a year between 1900-2200″;}
}
}
}
DisplayForm();
}
//User-defined Function to display the form in case of Error
function DisplayForm(){
global $strdate;

Explanation
*Expression ^[0-9]+$
^ :-Indicates the beginning of the string
[0-9]+ :- indicates that the string begins with a number between (0-9) and is followed by numbers.
$ :- Indicates the end of the String

To get your FORM result sent as an array to your PHP script you name the INPUT, SELECT, TEXTAREA elements like this:
<input name=”MyArray[]“>
<input name=”MyArray[]“>
<input name=”MyArray[]“>
<input name=”MyArray[]“>

If you do not specify the keys, the array gets filled in the order the elements appear in the form. Above example will contain keys 0, 1, 2 and 3. Notice the square brackets after the variable name, that’s what makes it an array. You can group the elements into different arrays by assigning the same name to c elements:
<input name=”MyArray[]“>
<input name=”MyArray[]“>
<input name=”MyOtherArray[]“>
<input name=”MyOtherArray[]“>
This produces two arrays, MyArray and MyOtherArray, that gets sent to the PHP script. It’s also possible to assign specific keys to your arrays:
<input name=”AnotherArray[]“>
<input name=”AnotherArray[]“>
<input name=”AnotherArray[email]“>
<input name=”AnotherArray[phone]“>
The AnotherArray array will now contain the keys 0, 1, email and phone.

Certain characters, for example ‘&’, have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings. There are several stages for which encoding is important. Assuming that you have a string $data, which contains the string you want to pass on in a non-encoded way, these are the relevant stages.

Passing a value through HTML FORM you must include it in double quotes, and htmlspecialchars() the whole value. For example see the code below

<?php echo “<input name=’data’ type=’hidden’ value=’” . c($data) . “‘>”; ?>

While passing a value through URL you must encode it with urlencode(). It will convert all non-alphanumeric characters except -_. with a percent (%) sign followed by two hex digits and spaces encoded as plus (+) signs. See example below.
<?php echo “<a href=’” . htmlspecialchars(”/nextpage.php?stage=23&data=” .urlencode($data) . “‘>\n”; ?>