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)
W3Schools
w3schools.com › php › func_array_sizeof.asp
PHP sizeof() Function
The sizeof() function is an alias of the count() function. ... <?php $cars=array ( "Volvo"=>array ( "XC60", "XC90" ), "BMW"=>array ( "X3", "X5" ), "Toyota"=>array ( "Highlander" ) ); echo "Normal count: " . sizeof($cars)."<br>"; echo "Recursive ...
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.
php - Length array in array - Stack Overflow
Out of the two count is probably preferable over sizeof if you do go with this method, sizeof is just an alias of count, and can cause confusion for some programmers since it doesn't do what many expect it to. 2016-02-29T11:02:29.057Z+00:00 ... However if the array you want to get the length ... More on stackoverflow.com
PHP array size limit?
Hi guys, I am having an urgent and hard to solve problem here. I can't seem to find why I'm having troubles with PHP and huge arrays (millions of 20+ char entries (actually 1 or 2 million)). A client asked me to build up a script which needs, at first, to take his 60mb+ files and place them into ... More on forums.phpfreaks.com
12
December 28, 2009Is there a PHP equivalent of Javascript's Array.find?
Why don't you make your cities array indexed by id?
More on reddit.com 14
5
October 29, 2017Review and Criticize my DIY Initial Solar Setup Planning and Sizing Attempt
Few observations: You used 0.03 hours of microwave use per day. Too low. If you use it for 20 minutes a day, it will be 0.33. I think you should similarly check the use of kettle. Washer use should be 25-40 hours per month in hot humid muggy Philippines and in a household with 24 KWH lifestyle. 😊 Split inverter aircon average consumption for 1.5 HP would not be more than 700W. For 1 HP it would be 500W. Peak consumption would be higher though. Honestly your solar build should target 35 KWH consumption per day. Initially you can splurge and in later years there will be a natural increase in consumption. For 35 KWH consumption you should have batteries with 32 KWH of battery storage. There will be plenty of direct panel to load consumption bypassing battery and hence battery capacity can be less than consumption. Use 16 KW inverter to allow for peak loads. Inverter is the weakest link so oversizing it may help it live longer. It will run calmer and cooler so to speak. Many of your bids are below spec. 16 KWH battery is PHP 90K - 100K. For 2, max 200K 16 KW Deye inverter 100K 20 panels 600 W + each 5000 pesos … 100 K Fixtures cables connectors safety devices 50 K Installation 8 pesos per installed watt 100K 12% VAT Total ~ 600K More on reddit.com
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April 5, 2026What is the primary function to get the PHP array length?
The primary and most recommended function to get the php array length is count(). This built-in function is specifically designed to count all the elements in an array or the properties in an object. It is straightforward, efficient, and universally understood by PHP developers. When you need to determine the number of items in any array, count() should be your first choice.
Code Example:PHP$fruits = ["Apple", "Banana", "Cherry"];$length = count($fruits);// $length is now 3
upgrad.com
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PHP Array Length: Easy Methods to Find Array Size in PHP
How do I properly use the PHP array length in a for loop?
A for loop is a common use case for the php array length. You typically initialize the loop counter at 0 and have it continue as long as the counter is less than the array's length. The length is retrieved once using count() before the loop starts for optimal performance.Code Example:PHP$colors = ["Red", "Green", "Blue"];$length = count($colors);for ($i = 0; $i < $length; $i++) { echo $colors[$i] . "
";}
";}
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PHP Array Length: Easy Methods to Find Array Size in PHP
How does checking the PHP array length affect performance?
Checking the php array length using count() is an extremely fast operation. PHP internally keeps track of the element count for each array, so when you call count(), it simply retrieves this stored value. This is an O(1) operation, meaning its execution time is constant and does not depend on the size of the array. Therefore, it is not a performance bottleneck, even for very large arrays.
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PHP Array Length: Easy Methods to Find Array Size in PHP
PHP
php.net › manual › en › function.count.php
PHP: count - Manual
count() can detect recursion to avoid an infinite loop, but will emit an E_WARNING every time it does (in case the array contains itself more than once) and return a count higher than may be expected. Returns the number of elements in value.
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 - The most common method to get the length of an array in PHP is by using the built-in count() function. This function counts the number of elements in an array and returns the result.
ReqBin
reqbin.com › code › php › iawpnvuz › php-array-length-example
How to get the length of an array in PHP?
The following is an example of getting the length of a PHP array using the count() function with the "COUNT_RECURSIVE" parameter.
W3Schools
w3schools.com › php › func_array_count.asp
PHP count() Function
Arrays Indexed Arrays Associative Arrays Create Arrays Access Array Items Update Array Items Add Array Items Remove Array Items Sorting Arrays Multidimensional Arrays Array Functions PHP Superglobals · Superglobals $GLOBALS $_SERVER $_REQUEST $_POST $_GET PHP RegEx PHP RegEx Functions
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 - The primary and most recommended function to get the php array length is count(). This built-in function is specifically designed to count all the elements in an array or the properties in an object. It is straightforward, efficient, and universally understood by PHP developers. When you need to determine the number of items in any array, count() should be your first choice.
Unibo
www-db.disi.unibo.it › courses › PAW › DOCS › w3schools › php › func_array_sizeof.asp.html
PHP sizeof() Function
The sizeof() function is an alias of the count() function. ... <?php $cars=array ( "Volvo"=>array ( "XC60", "XC90" ), "BMW"=>array ( "X3", "X5" ), "Toyota"=>array ( "Highlander" ) ); echo "Normal count: " . sizeof($cars)."<br>"; echo "Recursive count: " .
GitHub
github.com › mrsuh › php-var-sizeof
GitHub - mrsuh/php-var-sizeof: Function for getting size of any PHP variable in bytes · GitHub
It doesn't take into calculate the memory of handlers/functions/etc. ... <?php require_once __DIR__ . '/vendor/autoload.php'; $int = 1; printf("variable \$int size: %d bytes\n", var_sizeof($int)); $array = array_fill(0, 100, $a); printf("variable \$array size: %d bytes\n", var_sizeof($array)); $object = new \stdClass(); printf("variable \$object size: %d bytes\n", var_sizeof($object)); printf("class \$object size: %d bytes\n", var_class_sizeof($object));
Author mrsuh
Scaler
scaler.com › home › topics › how to find the length of an array in php?
How to Find the Length of an Array in PHP? - Scaler Topics
April 12, 2024 - In PHP, obtaining the size or length of an array is accomplished using the count() function. This function efficiently calculates and returns the total number of elements within an array, regardless of their data types. To get the size of an array:
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 - So instead of needing to recall the single variables, you could reference a single array item by its numeric key. ... For even more control, arrays also allow you to define your own array keys, using a string. $post_data = array( 'heading' => 'PHP Array Length Tutorial', 'subheading' => 'How to get an array size', 'author' => 'Jonathan Bossenger' );
Top answer 1 of 3
9
You can use Array Count function count or sizeof function.
try below code:
$array = array(
1,
2,
3,
["thing1", "thing2", "thing3"]
);
echo count($array[3]); //out put 3
echo sizeof($array[3]); //out put 3
2 of 3
3
You can use the count function:
echo count($array[3]);
However if the array you want to get the length is not always in this same position you could do something like this:
foreach ($array as $element) {
if (is_array($element) {
echo count($element);
}
}
BitDegree
bitdegree.org › learn › php-array-length
Learn About PHP Array Length: PHP Count Function Explained
August 14, 2017 - Using different modes fetches us different PHP array sizes: ... <?php $fruit = [ 'Banana' => ['Green', 'Yellow'], 'Apple' => ['Green', 'Yellow', 'Red'], 'Berry' => ['Blueberry', 'Strawberry'] ]; echo "Normal count: " . count($fruit)."<br>"; echo "Multidimensional count: " . count($fruit, 1); ?> ... <?php $fruit = [ 'Banana' => ['Green', 'Yellow'], 'Apple' => ['Green', 'Yellow', 'Red'], 'Berry' => ['Blueberry', 'Strawberry'] ]; echo "Normal count: " .
Educative
educative.io › answers › how-to-find-the-length-of-a-php-array
How to find the length of a PHP array
In PHP, we can use the count function to find the length of an array. It accepts an array as its argument and returns an integer. The count function has been available since PHP version 4. ... Line 3: We set the ＄drinks variable to an array ...
Pi My Life Up
pimylifeup.com › home › how to get the length of an array in php
How to get the length of an Array in PHP - Pi My Life Up
October 1, 2022 - If you haven’t yet been introduced to arrays, we recommend you check out our guide to arrays in PHP. The easiest way to get the length of an array within PHP is by utilizing the count() function.
ItSolutionstuff
itsolutionstuff.com › post › how-to-find-array-length-in-phpexample.html
How to Find Array Length in PHP? - ItSolutionstuff.com
May 14, 2024 - we will use count() function to get array length in php. so, let's see the simple code of how to get length of array in php.
TutorialKart
tutorialkart.com › php › php-array-length
How to find length of an array in PHP?
May 7, 2023 - To find the length of an array in PHP, use count() function.
PHP Freaks
forums.phpfreaks.com › php coding › php coding help
PHP array size limit? - PHP Coding Help - PHP Freaks
December 28, 2009 - Hi guys, I am having an urgent and hard to solve problem here. I can't seem to find why I'm having troubles with PHP and huge arrays (millions of 20+ char entries (actually 1 or 2 million)). A client asked me to build up a script which needs, at first, to take his 60mb+ files and place them into ...