PHP reads txt file and converts it into an array

In PHP development, reading external files and converting them into arrays is a very common task. Compared with other languages, PHP provides very convenient functions so that we can quickly process files. In this article, I will explain how to use PHP functions to read a txt file and convert it into an array.

1. Read txt file

First, we need to use the PHP built-in function file() to read the txt file. This function returns an array of file contents, with each line being an element in the array. The following is an example:

$file_contents = file('file.txt');

Here, file.txt is the file name we want to read, and $file_contents is the returned array containing the file contents.

2. Processing file content

Next, we need to parse the file content in order to convert it into an array. Usually we can use a loop statement to iterate through each row and use the explode() function to split it into multiple elements based on the specified delimiter. The following is an example:

$delimiter = ':';
$data = array();
foreach ($file_contents as $line) {
    $values = explode($delimiter, $line);
    $key = trim($values[0]);
    $value = trim($values[1]);
    $data[$key] = $value;
}

In this example, we assume that the txt file contains key-value pairs separated by colons. We specify this delimiter and pass it as a parameter to the explode() function. In the loop, we use the trim() function to remove the spaces from each element and assign them to the variables $key and $value respectively. Finally, we added the key-value pairs to an array called $data.

3. Full Example

The following is a complete example of reading and converting a txt file into an array:

$file_contents = file('file.txt');
$delimiter = ':';
$data = array();
foreach ($file_contents as $line) {
    $values = explode($delimiter, $line);
    $key = trim($values[0]);
    $value = trim($values[1]);
    $data[$key] = $value;
}

print_r($data);

In this example, we use Use the print_r() function to output the array. You can also process the array in other ways, such as inserting it into a database or serializing it to a file.

Summary

In this article, we discussed how to convert txt file to array using PHP functions. We used the built-in function file() to read the file, and the explode() and trim() functions to process the file contents. Through these techniques, we can quickly interact with txt files and convert them into other forms using PHP.

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