Keywords in PHP Language

In this article, we will see about keywords in PHP language.

What is Keywords

• Keywords are reserved words. Their meaning and purpose are already defined within the PHP, keywords must be used only for the purpose for which they are defined.
• All keywords are defined in lower case letters, Hence keywords must be written in lowercase letters.
• Keywords should not be used as identifiers or user-defined names;
  i.e for naming variables, constant, arrrays, functions, objects, etc do not use keywords.

Example (keywords in PHP):

1. echo – to display some text or some value in the browser.
2. if – to execute some set of statements based on the condition.
3. switch
4. for
5. foreach
6. break
7. function
8. array
9. try
10. new
11. and
12. class
13. var
14. private
15. abstract
16. extends
17. include
18. declare
19. die
20. empty
21. trait
22. print
23. endif
24. endswitch
25. endfor
26. endforeach
27. continue
28. return
29. atch
30. clone
31. or
32. interface
33. static
34. protected
35. final
36. implements
37. include_once
38. enddeclare
39. exit
40. isset
41. insteadof
42. eval
43. else
44. case
45. while
46. as
47. goto
48. callable
49. throw
50. xor
51. namespace
52. public
53. require
54. unset
55. use
56. elseif
57. default
58. endwhile
59. yield
60. global
61. finally
62. instanceof
63. require_once
64. do

Conclusion

So, there are 64+ keywords in PHP.