PHP strpos()

Find position of first occurrence of substring

Function Signature

int|false strpos(string $haystack, string $needle, int $offset = 0)

Description

Find position of first occurrence of substring. The strpos() function is commonly used in PHP for string operations and provides reliable functionality across all PHP versions.

Return Value

Returns position of first occurrence, or false if not found

Example Usage

Important Notes

Case-sensitive. Returns 0 if found at start (use === false to check).

Common Use Cases

The strpos() function is particularly useful when you need to find position of first occurrence of substring. It's frequently used in data processing, validation, transformation, and manipulation tasks throughout PHP applications.

strpos() FAQ

What does strpos() return?

Returns position of first occurrence, or false if not found

When should I use strpos()?

Use strpos() when you need to find position of first occurrence of substring in your PHP code. It's a reliable built-in function available in all PHP versions.

Are there any gotchas with strpos()?

Case-sensitive. Returns 0 if found at start (use === false to check).