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PHP (Syntex (Variable (Naming Rules (case sensative, begin with letter / _…

- - - - $var_name =value
    - - case sensative
      - begin with letter / _
      - no space but _ alowed
    - - store and manipulate data
  - - - Example
        
        echo $variable name
        
        echo "hello world"
      - Output text
    - - It's change type of a variable
  - - - Indexed
      - Associative
      - Multi dimensional
  - - - String
        
        "string"
        
        বর্ণ গুচ্ছ
        
        example
        
        $stringnam="stringvalue"
        
        char array
      - int
        
        5,10,6
      - float
        
        5.25
      - boolean
        
        True, false
      - array
      - object
      - rsc
      - null
        
        null
  - - - if
        
        if( expression )
        { block
        }
      - if else
      - swtich
        
        switch (n) {
        case value1;
        block;
        break;
        case value2:
        block2;
        break;
        default;
        }
    - - While
        
        while () { }
      - for
        
        for(var=0;var<5;var++){}
      - do
        
        do { } while ()
      - foreach
        
        foreach(array as value){}