PHP basic element with EXAMPLE

 Character
   Characters are often used in programming languages ​​or HTML in php
 Identifier
is a name coined by the programmers to name variables, functions and classes.

Identifier Naming rules:
A. Starting with the letter or the underscore (_)
2. Subsequent characters can be letters, numbers, or underscore (_)
3. Are case sensistive,
4. Not use punctuation.

example:

• the name of
• nama_pengguna
• _nama
• kuartal13
• Username
 
 Type of data
  Data types are divided into 4 parts:
1. integer
state is the data type integer. Integer range depending on the platform, about 2 billion.
Integer can be expressed to decimal notation (base 10), hexadecimal (base 16) and octal (base 8).
The use of octal notation must begin with 0 (zero) while the use of hexadecimal notation preceded 0x

2. Doble
3. string
is a set of characters. In PHP a character is considered as a byte, so there are 256 different characters.
A string literal can dinyatakn in three different ways:
- A single quotation mark (single quote)
- Double quotation mark (double quote)
- Heredoc sintax

4. boolean
      is the simplest type of data, ie to express a truth value TRUE (true) or FALSE (false), which is case sensitive.
example:
$ pass = TRUE;


 Variables
dala is a computer memory location to store a value or data. The contents of a variable can change during the program.
Dealam PHP variables are always preceded by a $ sign, followed by variable names are case sensitive.

                Examples of naming variables:
variable Specification
Price Unit One, because there are spaces
Wages / Day One, because there are signs /
4persegi One, because the leading
True _4persegi
True GajiTotal
True Nama_Tamu

                  Divided into three types:
A. Global variables
is a global variable that can be known and used by all parts of the script.
2. Local variables
is a variable that is defined in a function so that the variable can only be identified and used in the function of declaring variables.
3. Static variables
is a variable that exists only in the local scope of a function. Variable does not eliminate the value of the end when finished and leave the function is executed.

•    Example script variabel
Nama file : variabel.php





    $Nama = “Ray”;
    $NAMA = “Rio”;
    $nama = “Roy’;
    echo “$Nama, $NAMA, $nama “;
?>




•    Examples of single quotation marks string script





$tulisan = ‘Menggunakan PHP’;
echo ‘Ini adalah suatu string’.’,br>’;
echo ‘Anda bisa menyisipkan newlines dalam string, seperti ini.’.’
’;
echo ‘Arnold berkata: I\’ll be back’.’
’;
echo ‘are you sure you want to delete c:\\*.*? ‘.’
’;
echo ‘am trying to include at this point:\rn a newline’.’
’;
echo ‘$tulisan’.’
’;
?>


 
• Sample script string double quotes





$tulisan = “Menggunakan PHP”;
echo “Ini adalah suatu string”.”,br>”;
echo “Anda bisa menyisipkan newlines dalam string, seperti ini.”.”
”;
echo “Arnold berkata: I\’ll be back”.”
”;
echo “are you sure you want to delete c:\\*.*? “.”
”;
echo “am trying to include at this point:\rn a newline”.”
”;
echo “$tulisan”.”
”;
?>

  • Sample script heredoc string sintax
Nama File : string3.php

Penggunaan heredoc sintax

$STRINGKU = <<Menggunakan PHP.
AKHIR;
echo <<String yang dihasilkan menggunakan heredoc
sintax

\$STRINGKU =$STRINGKU
KET;
?>


 
• Sample script boolean
Nama File : Boolean1.php

Contoh Nilai Boolean

        $a = TRUE;
        $b = false;

Hasil eksekusi dengan PHP :

Hasil eksekusi dengan PHP :

    $a = TRUE;
    $b = false;
    echo “$a = $a”.”
”;
    echo “$b = $b”;
?>


 
• Example of script integer
Nama File : integer.php

Tipe Data Integer

        $Harga = 15000;
        $Jumlah = 5;
        $HargaTotal = $Harga * $Jumlah;
echo “Harga = $Harga”.”
”;
        echo “Jumlah = $Jumlah”.”
”;
        echo “Harga Total =
            $HargaTotal”.”

”;
        $large_number = 2147483647;
var_dump($large_number);
    echo “
”;
    $large_number = 2147483648;
    var_dump($large_number);
    echo “
”;
    var_dump(80000000);
    echo “
”;
    $million = 1000000;
    $large_number = 50000 * $million;
    var_dump($large_number);
?>