Searching for a word inside a text string
Required: Input string ( main string for searching )
Required: used to search the first occurance inside Input string
Optional: default FALSE, if set to TRUE then output returns the string before the first occurrence of $needle ( excluding the $needle )
This is case sensitive search. Use stristr() for case in-sensitive search
Example 1 of strstr()
Example 2 of strstr()
Example 3 of strstr()
Uses of strstrWe can find out existence of a word or combination of words in a string. For example we don't want some words to be posted by the user while submitting any message or text to the system. We can check the existence of the word by using stristr() function and know the presence of the string. This is case insensitive checking.
For a case sensitive checking we can use strstr function
Another example is checking of links posted by users in a site where any one can post jokes. Some people were posting links in the text area to their sites. To prevent that , stristr function is used to check the presence of https:// in the posted message. Or it can be checked the presence of <a in the posted string to identify a link. Here is the syntax of this function.
string stristr (main string , checking string)
This function returns true if the checked string is found within the main string. Now here is a code which uses stristr function and returns true after checking the word.
Let us try to collect domain part from the email address by using strstr function.
We can also use split command to get the domain part from email address.
Searching Blank space inside a string
The output is