PHP Articles - Page 23 of 90

imagecreatefromjpeg() is an inbuilt function in PHP that is used to create a new image from a JPEG file. It returns an image identifier representing the image obtained from the given filename.Syntaxresource imagecreatefromjpeg(string $filename)Parametersimagecreatefromjpeg() uses only one parameter, $filename, that holds the name of the image or path to the JPEG image.Return Valuesimagecreatefromjpeg() returns an image resource identifier on success, and it gives an error on false.Example 1OutputExample 2Input ImageOutput ImageExplanation − In Example 2, we loaded the jpeg image from the local path using the imagecreatefromjpeg() function. Thereafter, we used the imageflip() function to flip the image.Example 3 − ... Read More

PHP 8 uses a new built-in exception ValueError. PHP throws this exception when we pass a value to a function, which has a valid type but cannot be used for operation. In the earlier versions of PHP, we used to get a Warning error in such cases, but PHP 8 will show a ValueError.Example: ValueError in PHP 8OutputFatal error: Uncaught ValueError: array_rand(): Argument #1 ($array) cannot be emptyExample Live DemoOutputbool(false)Example: ValueError in PHP 8OutputFatal error: Uncaught ValueError: array_rand(): Argument #1 ($array) cannot be empty

In the previous versions of PHP, if we wanted to catch an exception, then we needed it to store in a variable to check whether that variable is used or not.Before PHP 8, to handle the exception catch block, we needed to catch the exception (thrown by the try block) to a variable.Example: Capturing Exception Catches in PHPExplanation − In the above program, the exception is being caught by the catch block to a variable $e. Now the $e variable can hold any information about the exception as code, message, etc.PHP 8 introduced non-capturing catches. Now, it is possible to ... Read More

In PHP 8, fdiv() function is used to perform floating-point division on IEEE 754 standard. fdiv() is a mathematical operation that divides two numbers and returns a floating-point number.The fdiv() function works similar to the intdiv() and fmod() function, which allows division by zero. Instead of showing an error, the fdiv() function returns INF, -INF or NAN, when a number is divided by zero.INF (Infinity or real number) – It is the result of a numerical calculation that is mathematically infinite.-INF (Negative Infinite) – it is a negative infinite number or a number below -1.796E308.NAN (Not a Number) – it ... Read More

str_starts_with and str_ends_with function are added in PHP 8 to check if a given string starts or ends with another string or not. If it starts and ends with another string, it returns true, otherwise false.Examplestr_starts_with('hello haystack', 'hello'); //starts string found 'True' str_starts_with('hello haystack', 'stack'); //ends string found 'True'str_starts_with('hello haystack', 'hay'); //starts string found 'False' str_starts_with('hello haystack', 'hay'); //ends string found 'False'str_starts_with() function in PHP 8This function checks if a given string starts with the string needle. It returns true if the first string is found, otherwise false.str_starts_with(string $haystack, string $needle): boolExample : using str_starts_with() function.OutputString starts with 'hello'Note: If ... Read More

Weak Maps were added in PHP 7.4. It can be used to remove or delete objects when the cache refers to objects entity classes. It references to those objects, which does not avoid objects from memory garbage collected. In PHP 8, weak maps allow us to store random data linked to objects, without leaking any memory.In other words, a weak map in PHP 8 is a group of objects in which keys weakly reference. A weak map uses a class to create an object which can be used as a key, which can help to remove and destroy the weak ... Read More

Trailing commas are being used in PHP since PHP 7.2 version. We can use trailing commas in the last item in the array. We can add the element of the array without modifying the last line of the item if the line is already using a trailing comma.Trailing Commas before PHP 8.0Before PHP 8, we were not able add a comma to the end of the last parameter.Examplefunction($x, $y, $z){ }In PHP 8.0In PHP 8, we can add trailing commas at the end of the last parameter. PHP 8 allows using the trailing commas in the parameter list and Closure ... Read More

In PHP 8, a new Stringable Interface (__toSting) is added. This method starts with the double underscore (__). The __toString method allows getting an object represented as a string. When a class defines a method using __toString, then it will call an object whenever it needs to treat as a string.Example: Stringable Interface using __toString Live DemoOutputEmployee NameIn PHP 8, the Stringable interface makes it easy to pass strings. A Stringable interface adds automatically once a class implements the __toString method. It does not require implementing the interface explicitly. The Stringable interface can be helpful for type hinting whenever strict types ... Read More

PHP 8 uses nullsafe operator instead of a null check condition. Using the nullsafe operator, we can use a chain of calls. While evaluating the elements, if one chain element fails, then the execution of the entire chain will abort and it evaluates to null.When the left-hand side operator evaluates to null, then the whole chain of execution will stop and it evaluates to null. If it does not evaluate to null, then it will behave like a normal operator.The nullsafe operator can be chained, and the expression will be short-circuited from the first nullsafe operator that meets null.$employee->getDepartment()?->getAddress()->format();The nullsafe ... Read More

Match expression is a new feature that is added in PHP 8. It is very much similar to switch-case statements, but it provides more safe semantics.Match expression does not use the 'case and break' structure of switch-case statements. It supports joint conditions, and it returns a value rather than entering a new code block.We can store match results in a variable because it is an expression.Match expression does not need a break statement like a switch. It supports only single-line expression.Example: PHP 7 Using Switch Statement Live DemoOutputHello World!Example: Above PHP 7 Code Using PHP 8 Match ExpressionOutputLooks Good!Example: Using PHP ... Read More