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Sizeof file in php

Содержание
  1. PHP sizeof() Function
  2. PHP sizeof() Function
  3. PHP
  4. PHP
  5. PHP — Function sizeof()
  6. Syntax
  7. Definition and Usage
  8. Parameters
  9. Return Value
  10. Example
  11. Warning: sizeof(): Parameter must be an array or an object that implements Countable php7.2
  12. Sizeof(): Parameter must be an array or an object that implements Countable
  13. sizeof

PHP sizeof() Function

So, if I replace that first string all these errors appear: Warning: Use of undefined constant ADDON_DISCOUNT_CODES — assumed ‘ADDON_DISCOUNT_CODES’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/index.php on line 6 Warning: Use of undefined constant ADDON_BLOG — assumed ‘ADDON_BLOG’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/cp/template/default/admin_header.tpl on line 134 Warning: Use of undefined constant ADDON_LINK_CHECKER — assumed ‘ADDON_LINK_CHECKER’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/cp/template/default/admin_header.tpl on line 179 Those errors did NOT appear, and those things worked perfectly well until I changed How is this linked? It can take two different values as shown below: 0 : It is the default, does not count all elements of multidimensional arrays 1 : It Counts the array recursively (counts all the elements of multidimensional arrays)

PHP sizeof() Function

In this article, we will see how to get the length of the array using the sizeof() function in PHP. The sizeof() function is a built-in function in PHP and is used to count the number of elements present in an array or any other countable object.

Parameter: This function accepts 2 parameters which are described below:

  • array : This parameter represents the array containing elements that we need to count.
  • mode : This is an optional parameter and specifies the mode of the function. It can take two different values as shown below:
    • 0 : It is the default, does not count all elements of multidimensional arrays
    • 1 : It Counts the array recursively (counts all the elements of multidimensional arrays)

    Return Value: This function returns an integer value as shown in the syntax which represents the number of elements present in the array.

    We will understand the concept of the sizeof() function through the examples.

    Example 1 : This example illustrates the count of the number of elements in the one-dimensional array.

    PHP

    Example : This example illustrates the counting the number of elements in the multi-dimensional array.

    PHP

    Reference: http://php.net/manual/en/function.sizeof.php

    PHP array: count or sizeof?, Both are used to count elements in a array. sizeof () function is an alias of count () function used in PHP. However, count () function is faster and better than sizeof (). Please use count function, Here is a example how to count array in a element. The count () function returns the number of elements in an …

    PHP — Function sizeof()

    Syntax

    Definition and Usage

    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. This is particularly useful for counting all the elements of a multidimensional array. The default value for mode is 0. sizeof() does not detect infinite recursion.

    Parameters

    Required. Specifies an array

    Optional. Specifies the mode of the function.

    Return Value

    Returns the number of elements in an array.

    Example

    Try out following example −

    This will produce the following result −

    PHP compact() Function, Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. Definition and Usage The compact() function creates an

    Warning: sizeof(): Parameter must be an array or an object that implements Countable php7.2

    I updated to PHP 7.2 and it created an array (no pun intended) of issues. I’ve been knocking them out (mostly these sizeof and count() warnings. The one error we have :

    I tried fixing it like this :
    if (sizeof($this->config) < 1) <
    To this:
    if (!empty($this->config) &&(sizeof($this->config) < 1))

    But it creates lots more errors shown below, However, we fixed this one in the same way and it works perfectly. Changing this:
    if (0 < sizeof($this->language)) <
    To this:
    if (!empty($this->language) && (0 < sizeof($this->language)))

    Took away basically the same error. Now, keep in mind, the above warning is the ONLY error left. Everything else works perfectly, however, if I do «fix» the warning, I get a bunch of errors that break the site and seem irrelevant. So, if I replace that first string all these errors appear:

    • Warning: Use of undefined constant ADDON_DISCOUNT_CODES — assumed ‘ADDON_DISCOUNT_CODES’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/index.php on line 6
    • Warning: Use of undefined constant ADDON_BLOG — assumed ‘ADDON_BLOG’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/cp/template/default/admin_header.tpl on line 134
    • Warning: Use of undefined constant ADDON_LINK_CHECKER — assumed ‘ADDON_LINK_CHECKER’ (this will throw an Error in a future version of PHP) in /usr/www/domainlistings/phpmyd/cp/template/default/admin_header.tpl on line 179

    Those errors did NOT appear, and those things worked perfectly well until I changed if (sizeof($this->config) < 1)

    How is this linked? I’m not sure what is happening here, how that one line can make or break these other (seemingly irrelevant) things. Full code of inital problem (line 236):

    /** * Get a configuration value * @param string $key * @return mixed */ public function getConfig($key) < if (sizeof($this->config) < 1) < $this->loadConfig(); > return isset($this->config[$key]) ? $this->config[$key] : false; >

    I think what’s happening here is that the change you originally made ensures that loadConfig() never happens, and something in loadConfig() is responsible for defining all those constants you’re getting warned about after changing that.

    if (!empty($this->config) &&(sizeof($this->config) < 1))

    then if $this->config was null (the default value of an object property that has not yet been given a value), then the second one would mean the if condition wouldn't be satisfied because null is empty, where in the first one, it would be satisfied because sizeof(null) still returns 0 even though it gives you the uncountable warning.

    sizeof was never really necessary there. You don't have to count something just to see if it exists.

    I think this should work just fine, and make more sense for what it's actually meant to do.

    if (empty($this->config)) < $this->loadConfig(); >

    You can just check, before passing the variable, if it's an array or not:

    For starters don't use sizeof , but count 😉 cheap improvement - always one opcode less.

    Secondly, make sure you pass an array, not null or whatever you have there, eg.:

    // dirty fix if (count((array) $this->config) > 0)

    To fix this properly you should never allow this property to be null anyway. If you're after some lazy loading check if the variable is null or is not an array, eg:

    public function getConfig($key, $default = false) < if (!is_array($this->config)) < // make sure it becomes one after the load $this->loadConfig(); > return $this->config[$key]) ?? $default; >

    These days you can use the null coalescing operator (??) to help in this scenario; i.e. by using it to take the given value if it's not null, or taken an empty array when the given value is null.

    Measure string size in Bytes in php, Byte size is measured with strlen (), whereas string length is queried using mb_strlen (). You can use substr () to trim a string to X bytes (note that this will break the string if it has a multi-byte encoding - as pointed out by Darhazer in the comments) and mb_substr () to trim it to X characters in the encoding of the …

    Sizeof(): Parameter must be an array or an object that implements Countable

    help me please

    geting error sizeof(): Parameter must be an array or an object that implements Countable 

    ErrorException Illuminate\Foundation\Bootstrap\HandleExceptions->handleError() <> C:\Primer_Proyecto\Ventas\vendor\paypal\rest-api-sdk-php\lib\PayPal\Common\PayPalModel.php:179 C:\Primer_Proyecto\Ventas\vendor\paypal\rest-api-sdk-php\lib\PayPal\Common\PayPalModel.php:281 C:\Primer_Proyecto\Ventas\vendor\paypal\rest-api-sdk-php\lib\PayPal\Common\PayPalModel.php:296 C:\Primer_Proyecto\Ventas\vendor\paypal\rest-api-sdk-php\lib\PayPal\Api\Payment.php:557 C:\Primer_Proyecto\Ventas\app\paypal.php:26 create($this->_apiContext);\r › >\r arguments: >

    This is the paypal.php code 

    public function generate()< $payment = \PaypalPayment::payment()->setIntent("sale") ->setPayer($this->payer()) ->setTransactions([$this->transaction()]) ->setRedirectURLs($this->redirectURLs()); try < $payment->create($this->_apiContext); > catch(\Exception $ex) < dd($ex); exit(1); >return $payment; > public function __construct($shopping_cart)< $this->_apiContext = \PaypalPayment::ApiContext($this->_ClientId, $this ->_ClientSecrete); $config = config("paypal_payment"); $flatConfig = array_dot($config); $this->_apiContext->setConfig($flatConfig); $this->shopping_cart = $shopping_cart; >

    I do not see the error, I have stayed too long looking for what is my mistake

    The error is in the paypal\rest-api-sdk-php package you are using. The version of the package you are using is, apparently, not exactly compatible with PHP 7.2.

    The specific error you are getting has been fixed in the latest version of the package ( 1.13.0 ). Update the package to the latest version, and this issue will be fixed. I cannot say what other issues may pop up, though.

    In the 1.12.0 version, the specific line that is failing is:

    In PHP 7.2, if $v is not Countable, the sizeof() call will emit a warning, and Laravel will turn that warning into an exception.

    In the 1.13.0 version, they updated the condition to be

    > elseif (is_array($v) && sizeof($v)

    Now, sizeof() will only be called when $v is an array, and therefore is guaranteed to be Countable, thus eliminating the warning.

    PHP sizeof() Function, Return Value: This function returns an integer value as shown in the syntax which represents the number of elements present in the array. We will understand the concept of the sizeof () function through the examples. Example 1: This example illustrates the count of the number of elements in the one …

    Источник

    sizeof

    I am quite surprised about previous posts. Here are my advices:

    1/ prefer the count() function instead of sizeOf() as sizeOf() is only an alias of count() and does not mean the same in many other languages based on C (avoid ambiguity).

    2/ prefer the powerful forEach() function to iterate over arrays.

    I would recommend not using sizeof(). Many programmers expect sizeof() to return the amount of memory allocated. Instead sizeof() -as described above- is an alias for count().

    Prevent misinterpretation and use count() instead.

    It is reccomended to set a variable first for this case:

    a) Always try and use PHP's internal routines to iterate through objects of various types (arrays in most examples below).

    Instead of interpreting your code to loop through them, they use their own internal routines which are much faster.

    (This is why foreach () will run faster than manual interation)

    b) It is _always_ good practice to leave as many static resulting functions outside of loops, having operations that return the exact same piece of data every iteration of the loop is not pretty on resources.

    c) I agree with PixEye's remarks on sizeof(). In PHP it is just an alias for the true function count(). It has other meanings logically in other languages rather than the number of elements in an object. This should be avoided as it may confuse developers transitioning to PHP from other languages.

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