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php

2021-01-06

Today, I learned : PHP tutorials​

Bookmark : javaTpoint (magic-constants) / tutorialsPoint (intro)

0. PHP​

1) echo statement​

  • can have multiple input variables, separated by comma(,)s.

2) PHP properties​

  • interpreted language (don't need compilers and such)
  • faster than other scripting languages
  • can be embedded into HTML.
  • object-oriented.
  • can create sessions.
  • can access / set cookies.
  • PHP is a secure language to develop the website. It consists of multiple layers of security to prevent threads and malicious attacks.

1. variable rules​

  • variable name starts with alphabet or underscore(_).
  • variable name is case-sensitive.
  • variable name starts with $ sign. constants doesn't.
  • static variable is stored dynamically and used globally.

2. special variable properties​

1)double-dollar ($$)​

PHP supports variable name as a variable.

2021.01.07

bookmark : javatpoint-phpForm

1.special Variables​

  • special variable starts and ends with double underscore(__).
  • case insensitive.
  • resolved at compile-time.

2. Array Definintion​

3. execution passage​

  • wrap the shell code with ` (shft+"~").

result : root

4. call by reference​

  • put ampersand(&) before the variable name.

result : Hello Call By Reference

5. parameter default value​

result : Hello Rajesh Hello Sonoo Hello John

6. Associative Array & traversing​

result : Key: Sonoo Value: 550000 Key: Vimal Value: 250000 Key: Ratan Value: 200000