Quick Answer: What is difference between ECHO and Print_r in PHP?

What is the main difference between ECHO and Var_dump in PHP?


var_dump() print_r()
var_dump() displays values along with data types as output. print_r() displays only value as output.
It does not have any return type. It will return a value that is in string format.
The data returned by this function is difficult to understand. The data returned by this function is human-readable.

What does Print_r do in PHP?

The print_r() function is a built-in function in PHP and is used to print or display information stored in a variable.

What is the difference between Print_r and Var_dump?

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 the meaning of echo in PHP?

echo is a statement, which is used to display the output. echo can be used with or without parentheses: echo(), and echo. echo does not return any value. We can pass multiple strings separated by a comma (,) in echo.

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What is Var_dump function in PHP?

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. This function is also effective with expressions.

How can you define PHP constants?

PHP constants can be defined by 2 ways: Using define() function. Using const keyword.

PHP constant: define()

  1. name: It specifies the constant name.
  2. value: It specifies the constant value.
  3. case-insensitive: Specifies whether a constant is case-insensitive. Default value is false. It means it is case sensitive by default.

What is PHP call function?

A PHP function provides code that a PHP script can call to perform a task, such as Count(), file_get_contents(), and header(). The PHP language supports both procedural and object-oriented programming paradigms.

Why we use $_ POST in PHP?

PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method=”post“. $_POST is also widely used to pass variables.

Can you console log in PHP?

We saw how PHP natively allows debugging and logging, and how we can utilise the browser console for the same. We saw how we can echo Javascript’s console. log() calls to write to the console using the json_encode() function. We also saw some Open Source frameworks that can help us log to the console.

What is DD () in laravel?

dd stands for “Dump and Die.” Laravel’s dd() function can be defined as a helper function, which is used to dump a variable’s contents to the browser and prevent the further script execution.

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How do I debug PHP?

Here are the steps to doing PHP programming:

  1. Check for PHP extensions in VS Code.
  2. Install the PHP Debug extension.
  3. Click “reload” to reload VS Code.
  4. Install Xdebug. …
  5. Now when you have the right version, put it in the PHP/ext directory.
  6. Next, you need to configure PHP to use the extension and allow remote debugging.

How do you iterate through an array in PHP?

To iterate over all elements of an indexed array, you use the following syntax:

  1. php foreach ($array_name as $element) { // process element here }
  2. php $colors = [‘red’, ‘green’, ‘blue’]; foreach ($colors as $color) { echo $color . ‘< …
  3. php foreach ($array_name as $key => $value) { //process element here; }