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PHP sizeof() Function
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PHP
php.net › manual › en › function.sizeof.php
PHP: sizeof - Manual
Instead sizeof() -as described above- is an alias for count(). Prevent misinterpretation and use count() instead. ... If your array is "huge" It is reccomended to set a variable first for this case: THIS-> $max = sizeof($huge_array); for($i ...
PHP array: count or sizeof? - Stack Overflow
To find the number of elements in a PHP $array, which is faster/better/stronger? count($array) or sizeof($array) ? Edit Thanks to Andy Lester, I have refined my question to mean from a multilingual More on stackoverflow.com
html - Sizeof array in php not working in the for loop - Stack Overflow
I'm trying to make some variables through an array in the for loop. The problem I came across is the for loop and defining the second parameter (sizeof array, or count). If in this place I put numb... More on stackoverflow.com
How to know the size of an array? (C)
You can't. You need to pass in the size of the array as another argument. More on reddit.com
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July 29, 2022How much RAM does a python list take with 6000 elements where each element is a string?
That depends on what's in the strings. A list with 6000 strings takes 24036 bytes, excluding the contents of the strings. That is, a python list of strings is an array of pointers to the separate strings. This array of pointers takes 24036 bytes. An empty string takes 21 bytes, so add 21*6000 = 126000. The string '1234567890' is, for example, 31 bytes. Note that all these values are implementation specific. You can use sys.getsizeof(object) to get the values for your system. Note that this does generally not take into account nested structures (such as strings in lists), so you will need to get those values all separately and add them. Furthermore, any object will have to define __sizeof__ for this to be used, so your custom classes will not work without this. To find the total bytesize of your list, you could use: import sys def get_size(my_list): size = sys.getsizeof(my_list) for item in my_list: size += sys.getsizeof(item) return size More on reddit.com
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May 19, 201901:00
4 - How to find Size of Numpy Array | NumPy Coding - YouTube
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Python | Length Array - YouTube
02:28
Python numpy Tutorial | How to identify the size of an array | ...
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Array count & Size in PHP | Tutorial 21 - YouTube
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📘 Learn PHP For Beginners - Arrays - YouTube
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Get The Length of an Array - sizeof function in php - YouTube
TutorialsPoint
tutorialspoint.com › sizeof-function-in-php
PHP - Function sizeof()
December 23, 2019 - Python TechnologiesDatabasesComputer ProgrammingWeb DevelopmentJava TechnologiesComputer ScienceMobile DevelopmentBig Data & AnalyticsMicrosoft TechnologiesDevOpsLatest TechnologiesMachine LearningDigital MarketingSoftware QualityManagement Tutorials View All Categories ... Count elements in an array, or properties in an object. If the optional mode parameter is set to COUNT_RECURSIVE (or 1), sizeof() will recursively count the array.
Jobtensor
jobtensor.com › Tutorial › PHP › en › Array-Functions-sizeof
PHP Built-in sizeof(), Definition, Syntax, Parameters, Examples | jobtensor
sizeof(array, mode) <?php // Example 1 $cities = array("New York", "London", "Tokyo", "Berlin", "Cairo"); echo sizeof($cities) . "<br>"; // Example 2 $persons = array( "Mark" => array(22, "USA"), "Jeff" => array(32, "JPN"), "Mike" => array(28, "RUS") ); echo sizeof($persons) .
ZetCode
zetcode.com › php-array › sizeof
PHP sizeof - Array Size in PHP
March 13, 2025 - SQLite Python · wxPython ebook · Windows API ebook · Java Swing ebook · Java games ebook · MySQL Java ebook · last modified March 13, 2025 · The PHP sizeof function returns the number of elements in an array. It's an alias of count and works identically.
GeeksforGeeks
geeksforgeeks.org › php › what-is-the-difference-between-count-and-sizeof-functions-in-php
What is the difference between count() and sizeof() functions in PHP ? - GeeksforGeeks
July 23, 2025 - 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: 7 · In conclusion, there is no difference between the count() and sizeof() methods of PHP.
ReqBin
reqbin.com › code › php › iawpnvuz › php-array-length-example
How to get the length of an array in PHP?
To get the array's length in PHP, you can use the count() and sizeof() functions that return the number of items in the array. Function sizeof() is the alias of the count() function.
Top answer 1 of 7
238
I would use count() if they are the same, as in my experience it is more common, and therefore will cause less developers reading your code to say "sizeof(), what is that?" and having to consult the documentation.
I think it means sizeof() does not work like it does in C (calculating the size of a datatype). It probably made this mention explicitly because PHP is written in C, and provides a lot of identically named wrappers for C functions (strlen(), printf(), etc)
2 of 7
118
According to phpbench:
Is it worth the effort to calculate the length of the loop in advance?
//pre-calculate the size of array
$size = count($x); //or $size = sizeOf($x);
for ($i=0; $i<$size; $i++) {
//...
}
//don't pre-calculate
for ($i=0; $i<count($x); $i++) { //or $i<sizeOf($x);
//...
}
A loop with 1000 keys with 1 byte values are given.
| count() | sizeof() | |
|---|---|---|
| With precalc | 152 | 212 |
| Without precalc | 70401 | 50644 |
(time in µs)
So I personally prefer to use count() instead of sizeof() with pre calc.
W3Schools
w3schools.am › php › func_array_sizeof.html
PHP sizeof() Function - W3Schools.am
<?php $cars=array ( "Volvo"=>array ( "XC60", "XC90" ), "BMW"=>array ( "X3", "X5" ), "Toyota"=>array ( "Highlander" ) ); echo "Normal count: " . sizeof($cars)."<br>"; echo "Recursive count: " . sizeof($cars,1); ?> Try it Yourself » ... Tabs Dropdowns Accordions Side Navigation Top Navigation Modal Boxes Progress Bars Parallax Login Form HTML Includes Google Maps Range Sliders Tooltips Slideshow Filter List Sort List · HTML CSS JavaScript SQL Python PHP jQuery Bootstrap XML Read More »
Carmatec
carmatec.com › home › how to get the length of an array in php: complete guide
How to Get the Length of an Array in PHP: Complete Guide
September 28, 2024 - $array = ['PHP', 'JavaScript', 'Python', 'Ruby']; $length = 0; foreach ($array as $item) { $length++; } echo "The length of the array is: " . $length; ... This manual approach demonstrates how a loop can iterate over each element and increment a counter, but it’s not practical compared to count(). Here are a few best practices to follow when working with arrays and their lengths in PHP: Always prefer count() or sizeof() for clarity: Using built-in functions is not only more efficient but also more readable to others who may read your code.
GeeksforGeeks
geeksforgeeks.org › php › how-to-get-total-number-of-elements-used-in-array-in-php
How to get total number of elements used in array in PHP ? - GeeksforGeeks
July 23, 2025 - Program 2: PHP program to count number of elements using sizeof() function. PHP · <?php // Create an associative array // with 5 subjects $array1 = array( 0 => 'php', 1 =>'java', 2 => 'css/html', 3 => 'python', 4 => 'c/c++' ); // Get total elements in array echo sizeof( $array1); ?> Output ·
Top answer 1 of 2
3
You're creating an empty array and then counting the size of it. Why would you expect anything but a count of zero?
What you really want is the size of the que array:
$length = count($_POST['que']);
But that makes some your code unnecessary since this is already an array.
for($j=1; $j<$length; $j++) {
// $question = $_POST['que']; UNNECESSARY
if($_POST['que'][$j] != "") {
$bla .= $j.'This is good<br/><br/>';
}
}
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0
<?php
$bla = "";
$question = $_POST['que'];
$length = count($question);
for($j=1; $j<$length; $j++) {
if($question[$j] != "") {
$bla .= $j.'This is good<br/><br/>';
}
}
echo $bla;
?>
Upgrad
upgrad.com › home › blog › software development › php array length: a complete guide to finding array length in php [with examples]
PHP Array Length: Easy Methods to Find Array Size in PHP
3 weeks ago - Displaying array elements is a common task in PHP, and using efficient methods ensures clarity and performance. Here is a look at the best methods to do so: ... Use PHP’s built-in functions like count(), sizeof(), and print_r() to simplify array handling and management.
W3Schools
w3schools.com › c › c_arrays_size.php
C Get the Size of an Array
In the next chapter, you will see how to use this formula to make loops that automatically adapt to the array size. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report an error, or if you want to make a suggestion, send us an e-mail: help@w3schools.com · HTML Tutorial CSS Tutorial JavaScript Tutorial How To Tutorial SQL Tutorial Python Tutorial W3.CSS Tutorial Bootstrap Tutorial PHP Tutorial Java Tutorial C++ Tutorial jQuery Tutorial
Codegive
codegive.com › blog › numpy_size_of_an_array.php
Numpy size of an array
The numpy size of an array refers to the total number of elements (scalars) present in the array. It is an attribute of the ndarray object, accessed directly using .size. This is distinct from the array's dimensions (shape) or its length along a specific axis (len()).
Honar Systems
honarsystems.com › home › php array length (4 methods)
PHP Array Length (4 Methods) | Honar Systems
August 21, 2025 - PHP array length, count, size, and others are expressions to find how many items are in the array. Sometimes size is different from count.
freeCodeCamp
freecodecamp.org › news › php-array-length-how-to-get-an-array-size
PHP Array Length Tutorial – How to Get an Array Size
August 27, 2021 - There are two common ways to get the size of an array. The most popular way is to use the PHP count() function. As the function name says, count() will return a count of the elements of an array.
IONOS
ionos.com › digital guide › websites › web development › python array length
How to find out the length of a Python array - IONOS
July 11, 2023 - Since the array has a total of six elements, the value 6 is now saved in the variable l. The len function can also be used to find the length of Python lists.
Npopov
npopov.com › 2011 › 12 › 12 › How-big-are-PHP-arrays-really-Hint-BIG.html
How big are PHP arrays (and values) really? (Hint: BIG!)
Those buckets will not be allocated (so we don’t need to spend the full 96 bytes), but the memory for the bucket pointer (the one stored in the internal bucket array) still needs to be allocated. So we additionally use 8 bytes (a pointer) * 31072 elements. This is 248576 bytes or 0.23 MB.
W3Schools
w3schools.com › python › gloss_python_array_length.asp
Python Array Length
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