View Discussion
Improve Article
Save Article
View Discussion
Improve Article
Save Article
The collection objects in PHP are characterized by a length parameter to indicate the number of elements contained within it. It is necessary to estimate the length of an array in order to perform array manipulations and modifications.
sizeof[] method: The sizeof[] method is used to calculate all the elements present in an array or any other countable object. It can be used for both uni-dimensional as well as multi-dimensional arrays.
sizeof[arr, mode]
Parameters: This method accepts two parameters that are discussed below:
- arr – The array to count the elements.
- mode – Indicator to check whether or not to count all the elements –
- 0 – Default. Does not count all elements of multidimensional arrays
- 1 – Counts the array recursively [counts all the elements of multidimensional arrays]
PHP
Output:
Array [
[Java] => Array [
[0] => SpringBoot
[1] => Eclipse
]
[Python] => Array [
[0] => Django
]
[PHP] => Array [
[0] => CodeIgniter
]
]
Sub elements of an array: 3
All elements of an array: 7count[] method: The count[] method is used to calculate all the elements in the array or any other countable object. It can be used for both uni-dimensional as well as multi-dimensional arrays.
count[arr, mode]
Parameters: This method accepts two parameters that are discussed below:
- arr – The array to count the elements.
- mode – Indicator to check whether or not to count all the elements –
- 0 – Default. Does not count all elements of multidimensional arrays
- 1 – Counts the array recursively [counts all the elements of multidimensional arrays]
PHP
Output
Array [
[Java] => Array [
[0] => SpringBoot
[1] => Eclipse
]
[Python] => Array [
[0] => Django
]
[PHP] => Array [
[0] => CodeIgniter
]
]
Sub elements of an array: 3
All elements of an array: 7Difference between sizeof[] and count[] methods:
- The sizeof[] method takes a longer execution time.
- The sizeof[] method is an alias of the count[] method.
Let us see the differences in a tabular form -:
| sizeof[] | count[] | |
| 1. | The sizeof[] function is used to return the number of elements in an array. | The count[] returns the number of elements in the array. |
| 2. | Its syntax is -: sizeof[array, mode] | Its syntax is -: count[array, mode] |
| 3. | Its return value is of integer type. | Its return value is of integer type. |
| 4. | This function is an alias of count[] function. | The count[] function may return 0 for a variable which is not set. |
| 5. | It is supported in PHP version 4.0+ | It is supported in PHP version 4.0+ |