PHP string contains

Question

What would be the most efficient way to check whether a string contains a     or not   I know you can do this in many different ways like with regular expressions or loop through the string to see if it contains a dot

User · Answer

You can use these string functions   strstr     Find the first occurrence of a string  stristr     Case-insensitive strstr    strrchr     Find the last occurrence of a character in a string  strpos     Find the position of the first occurrence of a substring in a string  strpbrk     Search a string for any of a set of characters  If that doesn t help then you should use preg regular expression  preg match     Perform a regular expression match

User · Answer

You can use  stristr   or strpos    Both return false if nothing is found

User · Answer

PHP 8 or newer  Use the str contains function  if  str contains  str   quot   quot          echo  Found it      else       echo  Not found       PHP 7 or older  if  strpos  str           FALSE        echo  Found it      else       echo  Not found       Note that you need to use the     operator  If you use    or  lt  gt  and the     is found at position 0  the comparison will evaluate to true because 0 is loosely equal to false

[php] PHP string "contains"

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