Intro to Built-in PHP Functions
Lesson 1 of 1
- 1If you’ve been paying attention so far, you might have picked up a theme in programming—shortcuts. Defining our own functions gives us an easier way to repeat similar code throughout a program. B…
- 2PHP includes useful built-in functions for getting information about variables. The gettype() function takes a variable as its argument and ret…
- 3We can find PHP built-in functions to accomplish common tasks. Need to reverse a string? There’s a built-in function for that! The [strrev() function](https://www.php.net/manual/en/function.strre…
- 4A substring is a portion of a string. For example, “hello” is a substring of the string “Oh hello, how are you?” and “el” is a substring of the string “hello”. Manipulating strings is very common…
- 5Another common task in programming is working with numbers, so it shouldn’t surprise us that PHP comes with some handy built-in functions for working with numbers. The [abs() function](https://ww…
- 6Generating random numbers may not seem obviously useful, but, as your programs become increasingly complicated, you’ll see this is actually a common task—for example to randomize data for testing. …
- 7In order to understand built-in functions we’ve never used before, we’ll want to get comfortable understanding how they are represented in the documentation. Documentation typically includes: + The…
- 8In order to find out about built-in functions (and other language features), you’ll want to get comfortable exploring the PHP documentation. The docs ca…
- 9In this lesson, you learned that built-in functions are functions provided by PHP. You learned about several specific built-in functions, how to understand a function’s description in the documenta…
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Stress-test your knowledge with quizzes that help commit syntax to memory