strpos() in PHP
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.
Syntax:
strpos(original_str, search_str, start_pos)
Parameters used:
Out of the three parameters specified in the syntax, two are mandatory and one is optional. The three parameters are described below:
- original_str (mandatory): This parameter refers to the original string in which we need to search the occurrence of required string.
- search_str (mandatory):This parameter refers to the string that we need to search.
- start_pos (optional): Refers to the position of the string from where the search must begin.
Return Type: This function returns an integer value which represents the index of original_str where the string search_str first occurs.
Example:
<?php // PHP code to search for a specific string's position // first occurrence using strpos() case-sensitive function function Search($search, $string){ $position = strpos($string, $search, 5); if (is_numeric($position)){ return "Found at position: " . $position; } else{ return "Not Found"; } } // Driver Code $string = "Welcome to GeeksforGeeks"; $search = "Geeks"; echo Search($search, $string); ?> |
Output:
Found at position 11
stripos() in PHP
This function also helps us to find the position of the first occurrence of a string in another string. This returns an integer value of the position of the first occurrence of the string. This function is case-insensitive, which means it treats both upper-case and lower-case characters equally. This function works similarly as strpos() , the difference is that it is case in-sensitive where as strpos() is case sensitive.
Syntax:
stripos(original_str, search_str, start_pos)
Parameters used:
Out of the three parameters specified in the syntax, two are mandatory and one is optional
- original_str (mandatory): This parameter refers to the original string in which we need to search the occurrence of required string.
- search_str (mandatory): This parameter refers to the string that we need to find.
- start_pos (optional):This parameter refers to the position of the string from where the search must begin.
Return Type: This function returns an integer value which represents the index of original_str where the string search_str first occurs.
Example:
<?php // PHP code to search for a specific string // first occurrence using stripos() case-insensitive function function Search($search, $string){ $position = stripos($string, $search, 5); if ($position == true){ return "Found at posiion " . $position; } else{ return "Not Found"; } } // Driver Code $string = "Welcome to GeeksforGeeks"; $search = "geeks"; echo Search($search, $string); ?> |
Output:
Found at position 11
