What functions are available in the PHP function library?

PHP function library contains many practical functions to meet development needs: Basic type conversion: int(), float(), bool() String operations: strlen(), strtoupper(), strtolower(), substr() array Operations: count(), array_merge(), array_keys(), array_values() Date and time operations: date(), strtotime(), time()

PHP Function Library: Explore its Powerful Features

PHP provides a vast library of functions that enable developers to perform various tasks easily and efficiently. This guide will take an in-depth look at commonly used functions in the PHP function library, and provide code examples and practical examples.

Basic type conversion function

• int(): Convert the value to an integer
• float ():Convert the value to a floating point number
• bool():Convert the value to a Boolean value

String operation function

• strlen(): Get the string length
• strtoupper(): Convert the string to uppercase
• strtolower(): Convert the string to lowercase
• substr(): Extract the substring of the string

Array operation function

• count():Get the number of array elements
• array_merge():Merge Two or more arrays
• array_keys():Get the key value of the array as an array
• array_values():Get the value of the array as Array

Date time function

• date():Format date time
• strtotime(): Convert date time string to Unix timestamp
• time(): Get the current Unix timestamp

Practical Case

Suppose you have an array containing student test scores:

$scores = [85, 90, 75, 95, 80];

To get the average of the scores in the array, you can use the following code:

$average = array_sum($scores) / count($scores);

Through this example, we demonstrate how to use various functions in the function library to perform string operations, array operations, and date and time conversions.

Using the PHP function library can greatly simplify development tasks and improve efficiency and code readability. Explore and integrate these powerful functions into your projects to create more efficient and maintainable applications.

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