Extracting a found portion of a string
The strstr( ) and stristr( ) functions search for the substring needle in the string haystack and return the portion of haystack from the first occurrence of needle to the end of haystack:
string strstr(string haystack, string needle) string stristr(string haystack, string needle)
The strstr( ) search is case-sensitive; the stristr( ) search isn't. If the needle isn't found in the haystack string, both strstr( ) and stristr( ) return false. The following examples show how the functions work:
$var = "To be or not to be"; print strstr($var, "to"); // "to be" print stristr($var, "to"); // "To be or not to be" print stristr($var, "oz"); // false
The strrchr( ) function returns the portion of haystack by searching for the single character needle; however, strrchr( ) returns the portion from the last occurrence of needle:
string strrchr(string haystack, string needle)
Unlike strstr( ) and stristr( ), strrchr( ) searches for only a single character, and only the first character of the needle string is used. The following examples show how strrchr( ) works:
$var = "To be or not to be"; // Prints: "not to be" print strrchr($var, "n"); // Prints "o be": Only searches for "o" which // is found at position 14 print strrchr($var, "oz");