PHP Stripos () functions and considerations for analysis _php Tutorials

Definition and usage
The Stripos () function returns the position of the first occurrence of a string in another string.

If the string is not found, false is returned.

Grammar
Stripos (String,find,start)

Parameters	Description
string	required. Specifies the string to be searched.
find	required. Specifies the character to find.
Start	Optional. Specify where to start the search.

Hints and Notes
Note: The function is not case sensitive. For case-sensitive searches, use the Strpos () function.
Because this function returns the position of the first occurrence of the returned string in another string. So this position could be 0.
So when the return value is 0, you need to be aware
Copy the Code code as follows:
if (Stripos ($r, ' a ') = = False) {

0 is a presence with "total but because 0 and false are equal, so it executes here
}
if (Stripos ($r, ' a ') = = = = False) {

We have to use all equals in this case.

}

http://www.bkjia.com/PHPjc/327548.html www.bkjia.com true http://www.bkjia.com/PHPjc/327548.html techarticle define and use the Stripos () function to return the position of the first occurrence of a string in another string. If the string is not found, false is returned. Grammar Stripos (string,find,st ...

