How to read a file and store it into an array using PHP

PHP is a server-side programming language that can be used to dynamically generate web page content, process form data, manage databases, and perform a variety of useful server tasks. There are many situations where we need to read a file and convert it into an array. Such a task can be easily achieved using PHP to read the file and convert it into an array. This article will introduce how to use PHP to read a file into an array.

1. Use the file_get_contents() function

PHP provides us with a variety of ways to read files. One of the simplest methods is to use the file_get_contents() function. This function reads the entire file as a string and returns the string. You can control how the file is read by appropriately setting the $options parameter.

The following is a simple example that demonstrates how to use the file_get_contents() function to read a file:

$file = 'example.txt';
$contents = file_get_contents($ file);
print($contents);

The $contents variable can be split into an array by passing it to the explode() function. Here is an example of reading the contents of a file containing comma-separated values ​​into an array:

$file = 'example.txt';
$contents = file_get_contents($file);
$array = explode(',', $contents);
print_r($array);

2. Use the file() function

Another way to read a file as an array The method is to use the file() function. This function reads the file as an array, with each line of the file representing an element in the array. Here is a simple example of reading the contents of a file into an array:

$file = 'example.txt';
$array = file($file);
print_r($array );

As you can see, this method is simpler and more direct. However, this method requires reading the file into memory line by line, which can cause memory issues if the file is too large.

3. Use the fread() function

Another method is to use the fread() function. This function allows you to read the contents of a file in binary form and returns the number of bytes read. Reading a file and converting it to an array this way requires multiple statements. The following is an example of using the fread() function to read a file into an array:

$file = 'example.txt';
$handle = fopen($file, 'r');
if ($handle) {

$contents = fread($handle, filesize($file));
fclose($handle);
$array = explode(' ', $contents);
print_r($array);

}

Open the file through the fopen() function and read the contents of the file using the fread() function. After processing, split it into arrays via explode() function. This array can then be used.

No matter which method is used, reading a file into an array is a relatively simple operation. Also note that when using any of the methods of reading a file into an array, you must ensure that the file exists and has the appropriate permissions.

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