stripos() : Position of first occurence of the search ( case-insensitive )string
Main_string : The string inside of which the search_string will be searched.
search_strig : This is searched within the Main_string.
offset : (optional, integer ) Starting point of search but position count is returned from beginning or ending of the string. Negative integer is allowed to search from end of the string in PHP version 7.0.1
Using OffsetNote that first position is 0 ( zero ) .
Position is returned starting from beginning of the string or from ending of the string (negative offset is added in PHP version 7.0.1). This counting of position is irrespective of given offset.
Checking return valueWe may get Boolean value as false and it may also return non-Boolean value. We need to evaluate the return value using === operator or !== to get the correct output. Check this code below and the outputs
Using the same code we will search for sub-string W
The search string ( W ) is already present at position 0 . Above code need to change like this to get correct output.
Use === or !== to test the return value
case-insensitivestripos() is case insensitive
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