To help you prepare for PHP string-related interview questions, let’s delve into the top 20 PHP string interview questions and their comprehensive answers.
Q1. What is a string in PHP?
Ans: A string is a sequence of characters, either alphanumeric or special symbols, enclosed within single quotes (‘’) or double quotes (“”).
Q2. How do you concatenate strings in PHP?
Ans: Strings can be concatenated using the dot (.) operator or by using the concatenation assignment operator (.=).
Q3. Explain the difference between single quotes and double quotes in PHP.
Ans: Single quotes treat everything literally, while double quotes allow for variable interpolation and interpretation of escape sequences.
Q4. What is the strlen() function used for?
Ans: strlen() is used to find the length of a string in PHP.
Q5. How can you reverse a string in PHP?
Ans: You can reverse a string using the strrev() function.
Q6. What is the substr() function used for?
Ans: substr() is used to extract a portion of a string based on a specified start and length.
Q7. Explain the usage of strpos() function.
Ans: strpos() is used to find the position of the first occurrence of a substring within a string.
Read more: Online Interview Questions
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