<\/p>\n\n\n\n
PHP Built-in Functions<\/strong><\/h2>\n\n\n\nPHP programming<\/a> is a very efficient and effective scripting language with a large number of built-in functions. These built-in functions come with the installation package setup.<\/p>\n\n\n\n<\/p>\n\n\n\n
Additionally, there are other categories into which the language’s built-in functions are in. <\/p>\n\n\n\n
<\/p>\n\n\n\n
This is because it has more than 1000 built-in functions<\/a> that need to show where they belong in programming. <\/p>\n\n\n\nPHP User Defined Functions<\/strong><\/h2>\n\n\n\nThe PHP user-defined functions, on the other hand, are the functions from the programmer’s concept. <\/p>\n\n\n\n
<\/p>\n\n\n\n
These functions were not based on the language but were created to support the function that is not available in the language’s package.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Programmers apply user-defined functions to create unique functions in their programs. For this instance, the characteristic of a user-defined function includes:<\/p>\n\n\n\n
\n- It is a collection of statements that repeats throughout a program.<\/li>\n<\/ul>\n\n\n\n
\n- This function does not execute automatically when a webpage loads.<\/li>\n<\/ul>\n\n\n\n
\n- Its call to a function will execute the function.<\/li>\n<\/ul>\n\n\n\n
<\/p>\n\n\n\n
Create a User-Defined Function in PHP<\/b><\/h2>\n\n\n\n
In this section, you will learn how to create a user-defined function in PHP. But note that the example below varies depending on the kind of function that you want to imply.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Syntax:<\/strong><\/h3>\n\n\n\nSampleFunction FunctionName() {\n code for the user-defined function;\n}<\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Remember that the first character of a function name must be a letter or an underscore. However, the function names are case-insensitive.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Example<\/strong>:<\/h3>\n\n\n\nIn this example, we will try to create a user-defined function named “Mytxt()<\/code><\/mark>“.<\/p>\n\n\n\n<!DOCTYPE html>\n<html>\n<head>\n\t<title><\/title>\n<\/head>\n<body>\n\n<?php\nfunction Mytxt() {\n echo \"Welcome to ITSourceCode.com!\";\n}\nMytxt(); \/\/ call the function\n?>\n\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Function-with-Advanced-Example-Mytxt.php-Output.png\")
<\/a>User-defined Function – Output<\/em><\/figcaption><\/figure><\/div>\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThe sample function Mytxt()<\/code><\/mark> implements its scope within the open and closed curly braces ({ function; }<\/code><\/mark>). <\/p>\n\n\n\n<\/p>\n\n\n\n
As seen in the output, the function displays the text containing “Welcome to ITSourceCode!<\/code><\/mark>“.<\/p>\n\n\n\n<\/p>\n\n\n\n
PHP Function Arguments<\/strong><\/h2>\n\n\n\nIn PHP, arguments are similar to variables and they often pass through value. <\/p>\n\n\n\n
<\/p>\n\n\n\n
This indicates that a copy of the value is available within the function, while the variable given to the function is unchangeable. <\/p>\n\n\n\n
<\/p>\n\n\n\n
In addition, arguments are present within parentheses following the function name. <\/p>\n\n\n\n
<\/p>\n\n\n\n
You may include as many arguments as you like, but you must separate them with commas.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<!DOCTYPE html>\n<html>\n<body>\n\n<?php\nfunction Country($cityName) {\n echo \"$cityName Philippines<br>\";\n}\n\nCountry(\"Pasig City,\");\nCountry(\"Bacolod City,\");\nCountry(\"Manila City,\");\nCountry(\"Baguio City,\");\nCountry(\"Davao City,\");\n?>\n\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Function-Arguments-Output.png\")
<\/a>Hypertext Preprocessor<\/strong> Arguments – Output<\/em><\/figcaption><\/figure><\/div>\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\n<\/p>\n\n\n\n
To explain the scenario, when we call the Country()<\/code><\/mark> method, it also takes a corresponding $cityName<\/code><\/mark> as it was assigned as the function’s parameter. <\/p>\n\n\n\n<\/p>\n\n\n\n
This $cityName<\/code><\/mark> is the basis of the code to create a list of different city names with the same country name.<\/p>\n\n\n\n<\/p>\n\n\n\n
PHP is a Loosely Typed Language<\/strong><\/h2>\n\n\n\nPHP is different from other scripting languages in that it doesn’t have strict rules about how code should be written.<\/p>\n\n\n\n
<\/p>\n\n\n\n
However, based on the value of the variable, PHP automatically assigns a data type to it. Since the data types are not strictly defined, it is possible to add a string to an integer without running into problems.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Type declarations, however, were included in PHP 7. Including the strict<\/code><\/mark> declaration will cause it to throw a “Fatal Error<\/code><\/mark>” if the data types don’t match.<\/p>\n\n\n\nNow, the example below will try to call the function without using strict<\/code><\/mark> while passing both an integer and a string:<\/p>\n\n\n\n<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<?php\nfunction AddNum(int $x, int $y) {\n return $x + $y;\n}\necho AddNum(10, \"4\"); \n?><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-is-a-Loosely-Typed-Language-Output-1.png\")
<\/a>PHP is a Loosely Typed Language -Output<\/em><\/figcaption><\/figure><\/div>\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThe example program has two variable integers which are the $x<\/code><\/mark> and $y<\/code><\/mark>, and it should return the sum of the two variables through the return $x + $y; function<\/code><\/mark>.<\/p>\n\n\n\n<\/p>\n\n\n\n
The output proves that the program can still perform the addition function even if the other variable value is a string.<\/p>\n\n\n\n
<\/p>\n\n\n\n
PHP Default Argument Value<\/strong><\/h2>\n\n\n\nIn PHP, a value specified in the function declaration serves as the default argument. <\/p>\n\n\n\n
<\/p>\n\n\n\n
If the caller function doesn’t supply a value for the argument, the compiler will automatically assign the default. <\/p>\n\n\n\n
<\/p>\n\n\n\n
Moreover, the default value is overridden if the calling function has an assigned value.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Let us demonstrate the implementation of the PHP default argument value in the example below.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<?php\nfunction setTime($time = \"05:00\") {\n echo \"The time is : $time <br>\";\n}\nsetTime();\nsetTime(\"05:15\");\nsetTime(\"05:30\");\n?><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Default-Argument-Value-Example-Output.png\")
<\/a>PHP Default Argument Value – Example Output<\/em><\/figcaption><\/figure><\/div>\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThe example clarifies how the PHP program implements the default argument value. <\/p>\n\n\n\n
<\/p>\n\n\n\n
As seen in the program, it assigns \"05:00\"<\/mark><\/code> as the default value of the argument $time<\/code><\/mark>. <\/p>\n\n\n\n<\/p>\n\n\n\n
But the other calling functions such as setTime(\"05:15\");<\/code><\/mark> and setTime(\"05:30\");<\/code><\/mark> has their argument values which override the assigned default value.<\/p>\n\n\n\n<\/p>\n\n\n\n
PHP Functions – Returning values<\/strong><\/h2>\n\n\n\nPHP’s return keyword effectively terminates a function. Sometimes, this keyword utilizes the result of an argument as the function’s return value. <\/p>\n\n\n\n
<\/p>\n\n\n\n
If the return is applied outside of the function, it will terminate the PHP code file from running.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<?php\nfunction trySum(int $a, int $b) {\n \t$c = $a + $b;\n \treturn $c;\n}echo \"The sum of 3 and 9 is: \" . trySum(3,9) . \"<br>\";\necho \"The sum of 10 and 4 is: \" . trySum(10,4) . \"<br>\";\necho \"The sum of 12 and 7 is: \" . trySum(12,7);\n?><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Functions-Returning-Values-Example-Output.png\")
<\/a>Hypertext Preprocessor<\/strong> – Returning Values Example Output<\/em><\/figcaption><\/figure>\n\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThis example shows that the return keyword returns the value of the variable $c<\/code><\/mark> it is the sum of the arguments $a<\/code><\/mark> and $b<\/code><\/mark>.<\/p>\n\n\n\n<\/p>\n\n\n\n
PHP Return Type Declarations<\/strong><\/h2>\n\n\n\nThis time, let us use the PHP return for type declarations and the example below will demonstrate how this method works. <\/p>\n\n\n\n
<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<?php\nfunction addNumbers(float $a, float $b) : float {\n return $a + $b;\n}\necho addNumbers(12.8, 1.2); \n?><\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
Output:<\/strong><\/h3>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Function-Return-Type-Declarations-Example-Output.png\")
<\/a>Hypertext Preprocessor<\/strong> – Return Type Declarations Example Output<\/em><\/figcaption><\/figure><\/div>\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThe return statement in PHP 7 also supports Type Declarations. When defining the function, place the type declaration just before the initial curly bracket ({), followed by a colon (:).<\/p>\n\n\n\n
<\/p>\n\n\n\n
Passing Arguments by Reference<\/strong><\/h2>\n\n\n\nAnother PHP function is the passing of arguments by reference and in this section, we will have an example of that.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n<?php\nfunction addInteger(&$sum) {\n $sum += 5;\n}\n$int = 11;\naddInteger($int);\necho $int;\n?><\/code><\/pre>\n\n\n\nOutput<\/strong><\/p>\n\n\n\n![\"PHP](\"https:\/\/itsourcecode.com\/wp-content\/uploads\/2022\/09\/PHP-Funstion-Passing-Arguments-by-Reference.png\")
<\/a>Hypertext Preprocessor<\/strong> – Passing Arguments by Reference<\/em><\/figcaption><\/figure>\n\n\n\n<\/p>\n\n\n\n
Program Explanation:<\/strong><\/p>\n\n\n\nThe & (ampersand) symbol inserted before the variable parameter is used to pass an argument by reference, implementing a PHP function.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Frequently Ask Questions (FAQs)<\/strong><\/h2>\n\n\n\nWhat are PHP functions?<\/strong><\/h3>\n\n\n\nA function is a collection of statements that can be utilized several times within a program. <\/p>\n\n\n\n
This will not be automatically executed when a webpage loads. A call to a function will execute the function.<\/p>\n\n\n\n
<\/p>\n\n\n\n
What is a PHP function example?<\/strong><\/h3>\n\n\n\nA function is a piece of code that accepts an additional input in the form of a parameter, processes it, and returns a value. <\/p>\n\n\n\n
<\/p>\n\n\n\n
This functionality is a piece of code that can be used more than once, and it takes a list of parameters and returns a value.<\/p>\n\n\n\n
<\/p>\n\n\n\n
What are the types of functions in PHP?<\/strong><\/h3>\n\n\n\nThere are two types of functions in the PHP programming language:<\/p>\n\n\n\n
\n- Built-in Functions<\/li>\n\n\n\n
- User-defined Functions<\/li>\n<\/ul>\n\n\n\n
<\/p>\n\n\n\n
What is the function name in PHP?<\/strong><\/h3>\n\n\n\nFunction names must follow rules when implemented in the program. The name must start with a letter or an underscore and not with numeral figures.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Related Articles<\/strong><\/h2>\n\n\n\n\n- PHP Session Function (Start and Destroy)<\/a><\/li>\n\n\n\n
- PHP Anonymous Functions with Example Programs<\/a><\/li>\n\n\n\n
- PHP Chmod Dir Function With Examples<\/a><\/li>\n\n\n\n
- PHP Glob() Function With Examples<\/a><\/li>\n\n\n\n
- PHP Unlink Function With Example Program<\/a><\/li>\n<\/ul>\n\n\n\n
<\/p>\n\n\n\n
Summary<\/strong><\/h2>\n\n\n\nIn summary, this discussion has covered all the details that you need to understand functions in PHP. <\/p>\n\n\n\n
It is also provided with advanced examples to demonstrate the different kinds of potential functions that you may find in the language.<\/p>\n","protected":false},"excerpt":{"rendered":"
Like other programming languages, PHP has also built-in and user-defined functions that you may explore. Now, this PHP function with advanced examples will guide you through the language’s functions and … <\/p>\n
<\/p>\n\n\n\n
Additionally, there are other categories into which the language’s built-in functions are in. <\/p>\n\n\n\n
<\/p>\n\n\n\n
This is because it has more than 1000 built-in functions<\/a> that need to show where they belong in programming. <\/p>\n\n\n\n The PHP user-defined functions, on the other hand, are the functions from the programmer’s concept. <\/p>\n\n\n\n <\/p>\n\n\n\n These functions were not based on the language but were created to support the function that is not available in the language’s package.<\/p>\n\n\n\n <\/p>\n\n\n\n Programmers apply user-defined functions to create unique functions in their programs. For this instance, the characteristic of a user-defined function includes:<\/p>\n\n\n\n <\/p>\n\n\n\n In this section, you will learn how to create a user-defined function in PHP. But note that the example below varies depending on the kind of function that you want to imply.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Remember that the first character of a function name must be a letter or an underscore. However, the function names are case-insensitive.<\/p>\n\n\n\n <\/p>\n\n\n\n In this example, we will try to create a user-defined function named “ <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n The sample function <\/p>\n\n\n\n As seen in the output, the function displays the text containing “ <\/p>\n\n\n\n In PHP, arguments are similar to variables and they often pass through value. <\/p>\n\n\n\n <\/p>\n\n\n\n This indicates that a copy of the value is available within the function, while the variable given to the function is unchangeable. <\/p>\n\n\n\n <\/p>\n\n\n\n In addition, arguments are present within parentheses following the function name. <\/p>\n\n\n\n <\/p>\n\n\n\n You may include as many arguments as you like, but you must separate them with commas.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n <\/p>\n\n\n\n To explain the scenario, when we call the <\/p>\n\n\n\n This <\/p>\n\n\n\n PHP is different from other scripting languages in that it doesn’t have strict rules about how code should be written.<\/p>\n\n\n\n <\/p>\n\n\n\n However, based on the value of the variable, PHP automatically assigns a data type to it. Since the data types are not strictly defined, it is possible to add a string to an integer without running into problems.<\/p>\n\n\n\n <\/p>\n\n\n\n Type declarations, however, were included in PHP 7. Including the Now, the example below will try to call the function without using <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n The example program has two variable integers which are the <\/p>\n\n\n\n The output proves that the program can still perform the addition function even if the other variable value is a string.<\/p>\n\n\n\n <\/p>\n\n\n\n In PHP, a value specified in the function declaration serves as the default argument. <\/p>\n\n\n\n <\/p>\n\n\n\n If the caller function doesn’t supply a value for the argument, the compiler will automatically assign the default. <\/p>\n\n\n\n <\/p>\n\n\n\n Moreover, the default value is overridden if the calling function has an assigned value.<\/p>\n\n\n\n <\/p>\n\n\n\n Let us demonstrate the implementation of the PHP default argument value in the example below.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n The example clarifies how the PHP program implements the default argument value. <\/p>\n\n\n\n <\/p>\n\n\n\n As seen in the program, it assigns <\/p>\n\n\n\n But the other calling functions such as <\/p>\n\n\n\n PHP’s return keyword effectively terminates a function. Sometimes, this keyword utilizes the result of an argument as the function’s return value. <\/p>\n\n\n\n <\/p>\n\n\n\n If the return is applied outside of the function, it will terminate the PHP code file from running.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n This example shows that the return keyword returns the value of the variable <\/p>\n\n\n\n This time, let us use the PHP return for type declarations and the example below will demonstrate how this method works. <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n The return statement in PHP 7 also supports Type Declarations. When defining the function, place the type declaration just before the initial curly bracket ({), followed by a colon (:).<\/p>\n\n\n\n <\/p>\n\n\n\n Another PHP function is the passing of arguments by reference and in this section, we will have an example of that.<\/p>\n\n\n\n <\/p>\n\n\n\n Output<\/strong><\/p>\n\n\n\n <\/p>\n\n\n\n Program Explanation:<\/strong><\/p>\n\n\n\n The & (ampersand) symbol inserted before the variable parameter is used to pass an argument by reference, implementing a PHP function.<\/p>\n\n\n\n <\/p>\n\n\n\n A function is a collection of statements that can be utilized several times within a program. <\/p>\n\n\n\n This will not be automatically executed when a webpage loads. A call to a function will execute the function.<\/p>\n\n\n\n <\/p>\n\n\n\n A function is a piece of code that accepts an additional input in the form of a parameter, processes it, and returns a value. <\/p>\n\n\n\n <\/p>\n\n\n\n This functionality is a piece of code that can be used more than once, and it takes a list of parameters and returns a value.<\/p>\n\n\n\n <\/p>\n\n\n\n There are two types of functions in the PHP programming language:<\/p>\n\n\n\n <\/p>\n\n\n\n Function names must follow rules when implemented in the program. The name must start with a letter or an underscore and not with numeral figures.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n In summary, this discussion has covered all the details that you need to understand functions in PHP. <\/p>\n\n\n\n It is also provided with advanced examples to demonstrate the different kinds of potential functions that you may find in the language.<\/p>\n","protected":false},"excerpt":{"rendered":" Like other programming languages, PHP has also built-in and user-defined functions that you may explore. Now, this PHP function with advanced examples will guide you through the language’s functions and … <\/p>\nPHP User Defined Functions<\/strong><\/h2>\n\n\n\n
\n
\n
\n
Create a User-Defined Function in PHP<\/b><\/h2>\n\n\n\n
Syntax:<\/strong><\/h3>\n\n\n\n
SampleFunction FunctionName() {\n code for the user-defined function;\n}<\/code><\/pre>\n\n\n\nExample<\/strong>:<\/h3>\n\n\n\n
Mytxt()<\/code><\/mark>“.<\/p>\n\n\n\n<!DOCTYPE html>\n<html>\n<head>\n\t<title><\/title>\n<\/head>\n<body>\n\n<?php\nfunction Mytxt() {\n echo \"Welcome to ITSourceCode.com!\";\n}\nMytxt(); \/\/ call the function\n?>\n\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n
<\/a>Mytxt()<\/code><\/mark> implements its scope within the open and closed curly braces ({ function; }<\/code><\/mark>). <\/p>\n\n\n\nWelcome to ITSourceCode!<\/code><\/mark>“.<\/p>\n\n\n\nPHP Function Arguments<\/strong><\/h2>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n
<!DOCTYPE html>\n<html>\n<body>\n\n<?php\nfunction Country($cityName) {\n echo \"$cityName Philippines<br>\";\n}\n\nCountry(\"Pasig City,\");\nCountry(\"Bacolod City,\");\nCountry(\"Manila City,\");\nCountry(\"Baguio City,\");\nCountry(\"Davao City,\");\n?>\n\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n
<\/a>Country()<\/code><\/mark> method, it also takes a corresponding $cityName<\/code><\/mark> as it was assigned as the function’s parameter. <\/p>\n\n\n\n$cityName<\/code><\/mark> is the basis of the code to create a list of different city names with the same country name.<\/p>\n\n\n\nPHP is a Loosely Typed Language<\/strong><\/h2>\n\n\n\n
strict<\/code><\/mark> declaration will cause it to throw a “Fatal Error<\/code><\/mark>” if the data types don’t match.<\/p>\n\n\n\nstrict<\/code><\/mark> while passing both an integer and a string:<\/p>\n\n\n\nExample:<\/strong><\/h3>\n\n\n\n
<?php\nfunction AddNum(int $x, int $y) {\n return $x + $y;\n}\necho AddNum(10, \"4\"); \n?><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n
<\/a>$x<\/code><\/mark> and $y<\/code><\/mark>, and it should return the sum of the two variables through the return $x + $y; function<\/code><\/mark>.<\/p>\n\n\n\nPHP Default Argument Value<\/strong><\/h2>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n
<?php\nfunction setTime($time = \"05:00\") {\n echo \"The time is : $time <br>\";\n}\nsetTime();\nsetTime(\"05:15\");\nsetTime(\"05:30\");\n?><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n
<\/a>\"05:00\"<\/mark><\/code> as the default value of the argument $time<\/code><\/mark>. <\/p>\n\n\n\nsetTime(\"05:15\");<\/code><\/mark> and setTime(\"05:30\");<\/code><\/mark> has their argument values which override the assigned default value.<\/p>\n\n\n\nPHP Functions – Returning values<\/strong><\/h2>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n
<?php\nfunction trySum(int $a, int $b) {\n \t$c = $a + $b;\n \treturn $c;\n}echo \"The sum of 3 and 9 is: \" . trySum(3,9) . \"<br>\";\necho \"The sum of 10 and 4 is: \" . trySum(10,4) . \"<br>\";\necho \"The sum of 12 and 7 is: \" . trySum(12,7);\n?><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n\n
<\/a>$c<\/code><\/mark> it is the sum of the arguments $a<\/code><\/mark> and $b<\/code><\/mark>.<\/p>\n\n\n\nPHP Return Type Declarations<\/strong><\/h2>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n
<?php\nfunction addNumbers(float $a, float $b) : float {\n return $a + $b;\n}\necho addNumbers(12.8, 1.2); \n?><\/code><\/pre>\n\n\n\nOutput:<\/strong><\/h3>\n\n\n
<\/a>Passing Arguments by Reference<\/strong><\/h2>\n\n\n\n
Example:<\/strong><\/h3>\n\n\n\n
<?php\nfunction addInteger(&$sum) {\n $sum += 5;\n}\n$int = 11;\naddInteger($int);\necho $int;\n?><\/code><\/pre>\n\n\n\n<\/a>Frequently Ask Questions (FAQs)<\/strong><\/h2>\n\n\n\n
What are PHP functions?<\/strong><\/h3>\n\n\n\n
What is a PHP function example?<\/strong><\/h3>\n\n\n\n
What are the types of functions in PHP?<\/strong><\/h3>\n\n\n\n
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What is the function name in PHP?<\/strong><\/h3>\n\n\n\n
Related Articles<\/strong><\/h2>\n\n\n\n
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Summary<\/strong><\/h2>\n\n\n\n