Array calls between different web pages in php

In PHP development, array is a very common and important data type. Arrays often need to be passed or called between different web pages. Next we will introduce how to call arrays between different web pages in PHP.

1. Pass the array through the GET or POST method

You can pass the array to different web pages through the GET or POST method.

1. GET method passes array

The GET method is a standard method for passing parameter information to the server through the URL. Arrays can be passed to different web pages using the GET method. For example, suppose we have an array $person, which contains a person's name, gender, age and other information. We can pass the array as follows:

<a href="http://example.com/page2.php?name=<?php echo $person['name']; ?>&gender=<?php echo $person['gender']; ?>&age=<?php echo $person['age']; ?>">Link to Page2</a>

In the above code, we have implemented the passing of the array by passing the different keys and values ​​of the array $person to another page in the form of a URL. In the page2.php page, you can get the array through the following code:

$name = $_GET['name'];
$gender = $_GET['gender'];
$age = $_GET['age'];

$person = array('name' => $name, 'gender' => $gender, 'age' => $age);

Note: When passing the array through the GET method, you need to note that the value of the array cannot contain special characters, such as "&", "=", etc. , otherwise it will affect the correct parsing of the URL.

2. POST method passes array

The POST method is a method of passing parameter information to the server through the HTTP request body. The POST method is more secure and can pass more data than the GET method. Similar to the GET method, arrays can be passed to different web pages through the POST method. For example, suppose we have an array $person, which can be passed as follows:

<form method="post" action="http://example.com/page2.php">
  <input type="hidden" name="name" value="<?php echo $person['name']; ?>">
  <input type="hidden" name="gender" value="<?php echo $person['gender']; ?>">
  <input type="hidden" name="age" value="<?php echo $person['age']; ?>">
  <input type="submit" value="Go to Page2">
</form>

In the above code, we submit the different keys and values ​​of the array $person to another through a form using the POST method. A page that implements the transfer of arrays. In the page2.php page, you can get the array through the following code:

$name = $_POST['name'];
$gender = $_POST['gender'];
$age = $_POST['age'];

$person = array('name' => $name, 'gender' => $gender, 'age' => $age);

2. Pass the array through SESSION

SESSION is a very common session management mechanism in PHP. Through SESSION, data can be passed between different pages, and arrays can also be passed to different pages. For example, assuming we have an array $person, the array can be stored in SESSION as follows:

session_start();
$_SESSION['person'] = $person;

In another page, the array can be obtained through the following code:

session_start();
$person = $_SESSION['person'];

Note : When using SESSION to pass an array, you need to pay attention to issues such as starting the session and correctly setting the life cycle of SESSION.

3. Passing arrays through COOKIE

COOKIE is a kind of data stored in the client browser. It can pass data between different pages, and can also pass arrays to different pages. . For example, assuming we have an array $person, the array can be stored in COOKIE as follows:

setcookie('person[name]', $person['name'], time()+3600);
setcookie('person[gender]', $person['gender'], time()+3600);
setcookie('person[age]', $person['age'], time()+3600);

In another page, the array can be obtained through the following code:

$name = $_COOKIE['person']['name'];
$gender = $_COOKIE['person']['gender'];
$age = $_COOKIE['person']['age'];

$person = array('name' => $name, 'gender' => $gender, 'age' => $age);

Note : When using COOKIE to pass an array, you need to pay attention to issues such as setting the expiration time of the COOKIE and the correct path to access the COOKIE.

Summary:

Whether it is through GET, POST, SESSION or COOKIE, PHP provides a variety of methods for passing arrays between different pages. In actual development, we can choose different methods according to specific needs and security requirements. At the same time, we also need to pay attention to the correct transfer of arrays and prevent security issues from occurring.

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