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Questions and Answers
What does the substr() function do?
What does the substr() function do?
The substr() function returns a part of a string.
What is the syntax for the strtoupper() function?
What is the syntax for the strtoupper() function?
strtoupper(string);
What is the purpose of the strlen() function?
What is the purpose of the strlen() function?
Returns the length of a string.
Which function would you use to remove whitespace from both sides of a string?
Which function would you use to remove whitespace from both sides of a string?
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What does the strrev() function do?
What does the strrev() function do?
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What is the purpose of the explode() function?
What is the purpose of the explode() function?
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Study Notes
PHP String Functions
- The
substr()function returns a part of a string.- Syntax:
substr(string,start,length);
- Syntax:
- The
strtoupper()function converts a string to uppercase.- Syntax:
strtoupper(string);
- Syntax:
- The
strtolower()function converts a string to lowercase. - The
strlen()function returns the length of a string.- Syntax:
strlen(string);
- Syntax:
- The
trim()function removes whitespace and other predefined characters from both sides of a string.- Syntax:
trim(string, charlist); - The
ltrim()function removes whitespace or other predefined characters from the left side of a string. - The
rtrim()function removes whitespace or other predefined characters from the right side of a string.
- Syntax:
- The
strrev()function reverses a string.- Syntax:
strrev(string);
- Syntax:
- The
explode()function breaks a string into an array.- Syntax:
explode(separator,string);
- Syntax:
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Description
Test your knowledge on various PHP string functions in this quiz. Learn about how to manipulate strings using functions such as substr(), strtoupper(), and trim(). Challenge yourself to see how well you understand string operations in PHP.
