How to display two-dimensional array in php

In PHP, a two-dimensional array is a data structure containing multiple arrays. It is usually used to process data such as data tables, images, charts, etc. This article explains how to display a two-dimensional array.

1. Use for loop

Use for loop to display the elements in the 2-dimensional array one by one. The specific code is as follows:

$array = array(
    array('apple', 'banana', 'pear'),
    array('dog', 'cat', 'fish'),
    array('red', 'green', 'blue')
);

for($i=0;$i<count($array);$i++){
    for($j=0;$j<count($array[$i]);$j++){
        echo $array[$i][$j] . &#39; &#39;;
    }
    echo &#39;<br>';
}

In the above code, a 2-dimensional array $array is first defined. Then use two nested for loops to iterate through the entire array. In the inner loop, use the echo statement to output the value of the 2-dimensional array element. To make the output neater, we wrap the line after the inner loop ends.

2. Using a foreach loop

Another way to traverse a 2-dimensional array is to use a foreach loop. The specific code is as follows:

$array = array(
    array('apple', 'banana', 'pear'),
    array('dog', 'cat', 'fish'),
    array('red', 'green', 'blue')
);

foreach($array as $value){
    foreach($value as $val){
        echo $val . ' ';
    }
    echo '<br>';
}

In the above code, a foreach loop is used to traverse the 2-dimensional array. In the first foreach loop, $value is a 1D array within a 2D array. In the second foreach loop, $val is the element value in the 2-dimensional array. Use the echo statement to output the value of each element. To make the output neater, we wrap the line after the inner loop ends.

3. Use tables to display

In web development, we usually use tables to display data in 2-dimensional arrays. Tables can be created using HTML table tags. The specific code is as follows:

$array = array(
    array('apple', 'banana', 'pear'),
    array('dog', 'cat', 'fish'),
    array('red', 'green', 'blue')
);

echo '<table border="1">';
foreach($array as $value){
    echo '<tr>';
    foreach($value as $val){
        echo '<td>' . $val . '</td>';
    }
    echo '</tr>';
}
echo '</table>';

In the above code, a 2-dimensional array $array is first defined. Then use the echo statement to create an HTML table. Then use a foreach loop to iterate through the positions in the 2-dimensional array and put them into the corresponding cells using HTML table tags.

Conclusion

The above are three common methods to display 2-dimensional arrays. There is no best method, only the method that suits you best. In actual development, you can choose the most appropriate method to display a 2-dimensional array based on actual needs.

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