String Search Position - PHP Built-in Functions

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strpos()
This function is used to find the position of the first occurrence of a substring within a string. It searches for the substring from the beginning of the string and returns the position (0-based index) of the first match. If the substring is not found, it returns false.

strrpos()
This function is used to find the position of the last occurrence of a substring within a string. It searches for the substring from the end of the string and returns the position (0-based index) of the last match. If the substring is not found, it returns false.