Is PHP str replace case-sensitive?

You can use the PHP strpos() function to check whether a string contains a specific word or not. The strpos() function returns the position of the first occurrence of a substring in a string. If the substring is not found it returns false . Also note that string positions start at 0, and not 1.

strpos() Function: This function helps us to find the position of the first occurrence of a string in another string. This returns an integer value of the position of the first occurrence of the string. This function is case-sensitive , which means that it treats upper-case and lower-case characters differently.

stripos() is not case-sensitive .

Summary. PHP is partially case-sensitive. PHP constructs, function names, class names are case-insensitive, whereas variables are case-sensitive.

PHP str_replace is case-sensitive . If you need to perform a case-insensitive search, try str_ireplace() function. If the variable specified by the third argument is an array, the function will check every array element and will return an array.

PHP strcasecmp() Function

strripos() – Finds the position of the last occurrence of a string inside another string (case-insensitive ) strpos() – Finds the position of the first occurrence of a string inside another string (case-sensitive)