Similarly, array length in PHP may have numerous uses, depends on the context you’re working. We do not leave a topic dangling by missing out on its practical use. Advertisements BONUS: Common usage of array length in PHP You can use either of these functions to get array length in PHP. The output is similar to the count function. Let’s alter the function to count an array recursively. SizeOf function does have the $mode parameter. Let’s revisit the same example to get array length in PHP, using sizeOf instead. Using the SizeOf function to find the length of PHP Array Code Example Syntax sizeOf(array $value, int $mode = COUNT_NORMAL): int The sizeOf function counts all elements in an array. SizeOf function is just an alias of the count function. Let’s now move on to the next function: sizeOf. I use it all of the time whenever I need to count an unknown length set of values coming from a database or API.Ĭheck out the following example to see the count function going beyond second-level: Using Count for 2D PHP Array Length Code Example Ĭool. The COUNT_RECURSIVE constant in the count PHP function mode parameter is a great way to count all the elements in a multidimensional array. Using Count Function to Get Length of 2nd Level Multidimensional PHP Arrays COUNT_RECURSIVE counts the elements in the second level, which are the elements of Skills. The difference is clear, COUNT_NORMAL counts the elements in the first level, which are (Name, Age, Skills). Length of $arr (Using COUNT_RECURSIVE) is: 7 Length of $arr (Using COUNT_NORMAL) is: 3 Let's count this array using the count function (COUNT_RECURSIVE) and print it to console.Įcho "Length of \$arr (Using COUNT_RECURSIVE) is: ".count($arr,COUNT_RECURSIVE) Let's count this array using the count function (COUNT_NORMAL) and print it to console.Įcho "Length of \$arr (Using COUNT_NORMAL) is: ".count($arr)."\n" We’ll pass COUNT_RECURSIVE to it and see how it is different than the default COUNT_NORMAL. Remember, there’s a second parameter $mode for altering the function’s behavior. Let’s put this theory into action by examples. If $value null, the functions returns 0.If $value is not an array or object, the function returns 1.Returns the number of elements in $value.We can pass COUNT_RECURSIVE (or 1) to count an array recursively. $mode – An optional parameter with a default value of COUNT_NORMAL.Syntax count(array $value, int $mode = COUNT_NORMAL): int The count function counts all elements in an array. Array length in PHP: count function Description First, we’ll see the syntax and then elaborate it through examples. In this article, we’ll help you learn these functions. There are two similar functions to get array length in PHP. One common array operation is to determine its length, which is the number of elements an array has. We have seen many array functions in previous articles. Like any programming language, PHP provides helpful functions to work with arrays. PHP Count Function Code Example Īn array is a data structure to store multiple elements. I prefer the count function and would recommend avoiding the sizeOf function. You can also use the sizeOf function as it is just an alias of the count. The count function is the most common method. PHP provides two identical functions whenever you need to get the length of an array.
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