PHP

php variables

<?php
  $string = 'string';
  $number = 1;
?>

PHP Variables

<?php
$txt = "Hello world!";
$x = 5;
$y = 10.5;
?>

variables in php

<?php
  # To declare variables in php, you should prefix the variable name with
  # a dollar sign and assign it the value. For example:
  $msg = 'Hello World';
  $number = 10;
  $decimal = 98.6;
  $result = true;

  # To print out variable names, you can directly enter the variable name
  # inside of a print or echo statement. For example:
  echo "Variables: $msg, $number, $decimal, $result"
?>

php declare variable

// just assign it some value to declare it
$var = 'some value';

php variable

$name = "Josh"; //$varname = value

php variable definition

## Regex:
## ^[a-zA-Z_x80-xff][a-zA-Z0-9_x80-xff]*$

// PHP validate variable name

$regex = '/^[a-zA-Z_x80-xff][a-zA-Z0-9_x80-xff]*$/i';

// Valid
preg_match($regex, '_aas', $matches);
[
    "_aas",
]

// Valid
preg_match($regex, '_validVariable', $matches);
[
    "_validVariable",
]

// Valid
preg_match($regex, 'oth3r_valid_variable', $matches);
[
    "oth3r_valid_variable",
]

//Invalid
preg_match($regex, 'invalid Variable', $matches);
[]

//Invalid
preg_match($regex, '0th3r_invalid_vriable', $matches);
[]

//Invalid
preg_match($regex, '0th3r_invalid_variable', $matches);
[]

php variables examples

<?php
  //this is for beginners //
  $animal = "cow";
?>

how to declare variable in php

<?php
	//declaring a variable in php
  	$name = "Ahmed Issah";
	$age = 23;
  
?>

how to make a variable in php

$varName = "Hello, World";

php variables

<?php
/* In PHP, a variable starts with the $ sign, 
followed by the name of the variable:
*/

$txt = "Hello world!";
$x = 5;
$y = 10.5;
?>