Quick Answer: Is PHP Case Sensitive?

In PHP, Variable names are case-sensitive but function names are not case sensitive.

If you defined function name in lowercase, but calling them in uppercase it will work.

Note: Function names are case-insensitive, though it is usually good form to call functions in the same case as they appear in their declaration.

Is PHP class name case sensitive?

So function name is not case sensitive. In PHP, all keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are NOT case-sensitive whereas the variable names are case-sensitive and are preceded by a dollar ($) sign.

Which parts of PHP are case sensitive?

PHP & Case Sensitivity. In PHP, variable and constant names are case sensitive, while function names are not.

Is PHP string comparison case sensitive?

Another way to compare strings is to use the PHP function strcmp, this is a binary safe string comparison function that will return a 0 if the strings match. But this function is case sensitive so if one of the strings has an uppercase letter then the function will not return 0.

What does it mean to be case sensitive?

Text or typed input that is sensitive to capitalization of letters. For example, “Computer” and “computer” are two different words because the “C” is uppercase in the first example and lowercase in the second example. Anything that is not case-sensitive means that any uppercase or lowercase character can be entered.

Is PHP whitespace sensitive?

PHP is whitespace insensitive

Whitespace is the stuff you type that is typically invisible on the screen, including spaces, tabs, and carriage returns (end-of-line characters).

How do you define a constant in PHP?

PHP Constants

A constant is an identifier (name) for a simple value. The value cannot be changed during the script. A valid constant name starts with a letter or underscore (no $ sign before the constant name). Note: Unlike variables, constants are automatically global across the entire script.

What are the characteristics of PHP variables?

the characteristics of PHP variables are:

  • starts with the $ sign, followed by the name of the variable.
  • variable name must start with a letter or the underscore character.
  • variable name cannot start with a number.
  • variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )

What does PHP stand for?

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What is the role of <> operator in PHP?

Operators are symbols that tell the PHP processor to perform certain actions. For example, the addition ( + ) symbol is an operator that tells PHP to add two variables or values, while the greater-than ( > ) symbol is an operator that tells PHP to compare two values.

Is Strpos case sensitive?

This returns an integer value of the position of the first occurrence of the string. This function is case-insensitive, which means it treats both upper-case and lower-case characters equally. This function works similarly as strpos() , the difference is that it is case in-sensitive where as strpos() is case sensitive.

Is In_array case sensitive?

If needle is a string, the comparison is done in a case-sensitive manner. If the third parameter strict is set to TRUE then the in_array() function will also check the types of the needle in the haystack .

What is Strstr PHP?

The strstr() function is a built-in function in PHP. It searches for the first occurrence of a string inside another string and displays the portion of the latter starting from the first occurrence of the former in the latter (before if specified). It specifies a boolean value whose default is false.