PHP gives you several string functions that let you search for one string inside another:
| Function | Description |
|---|---|
| strstr() | returns whether the search text is within the string |
| strpos() and strrpos() | return the index position of the first and last occurrence of the search text, respectively |
| substr_count() | returns how many times the search text occurs within the string |
| strpbrk() | searches a string for any of a list of characters |