The var_dump() function is used to dump information about a variable. This function displays structured information such as type and value of the given variable. Arrays and objects are explored recursively with values indented to show structure.
What value will Var_dump show?
The var_dump function displays structured information about variables/expressions including its type and value. Arrays are explored recursively with values indented to show structure. It also shows which array values and object properties are references.
What is the difference between Var_dump and Print_r?
The var_dump() function displays structured information about variables/expressions including its type and value. Whereas The print_r() displays information about a variable in a way that’s readable by humans.
What is $$ var in PHP?
The $var (single dollar) is a normal variable with the name var that stores any value like string, integer, float, etc. The $$var (double dollar) is a reference variable that stores the value of the $variable inside it.
What is Var_dump () function explain with example?
The var_dump() function is used to dump information about a variable. This function displays structured information such as type and value of the given variable. Arrays and objects are explored recursively with values indented to show structure. … Return Type: This function has no return type.
What is Print_r?
The print_r() function is a built-in function in PHP and is used to print or display information stored in a variable. … This parameter is of boolean type whose default value is FALSE and is used to store the output of the print_r() function in a variable rather than printing it.
What is difference between ECHO and Print_r in PHP?
The difference is that print_r recursively prints an array (or object, but it doesn’t look as nice), showing all keys and values. echo does not, and is intended for scalar values. print_r prints human-readable information about a variable, while echo is used only for strings.
Can you console log in PHP?
There are two main ways you can log directly to the console using (mostly) PHP code. I can summarize it as using json_encode function and using PHP libraries.
How do I debug PHP?
Here are the steps to doing PHP programming:
- Check for PHP extensions in VS Code.
- Install the PHP Debug extension.
- Click “reload” to reload VS Code.
- Install Xdebug. …
- Now when you have the right version, put it in the PHP/ext directory.
- Next, you need to configure PHP to use the extension and allow remote debugging.
What is printf in PHP?
printf() function in PHP
The printf() function output a formatted string. It returns the length of the outputted string.
What is PHP file function?
A file is a resource for storing data. PHP has a rich collection of built in functions that simplify working with files. Common file functions include fopen, fclose, file_get_contents.
How many operators are there in PHP?
PHP String Operators
PHP has two operators that are specially designed for strings.
Why $$ is used in PHP?
The $ operator in PHP is used to declare a variable. In PHP, a variable starts with the $ sign followed by the name of the variable. For example, below is a string variable: … The $$var_name used to refer to the variable with the name as value of the variable $var_name.
Why do we use PHP?
PHP stands for Hypertext Preprocessor and is a server-side programming language. … A good benefit of using PHP is that it can interact with many different database languages including MySQL. We work with MySQL at Bluelinemedia since this is also a free language so it makes sense to use PHP.
What is PHP full form?
PHP (recursive acronym for PHP: Hypertext Preprocessor ) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.