asciiTable

asciiTable.php

<?php
declare(strict_types=1);

function asciiTable(array $rows, array $columns, ?callable $mapper = null): string
{
    if ($mapper === null) {
        $mapper = function (string $column, $value) {
            return $value;
        };
    }

    $cols = [];
    $maxes = [];
    foreach ($columns as $column => $name) {
        $column = is_int($column) ? $name : $column;
        $cols[$column] = $name;
        $maxes[$column] = strlen($name);
    }

    $array = [];
    foreach ($rows as $row) {
        $item = [];
        foreach ($cols as $col => $name) {
            $value = $mapper($col, $row[$col]);
            $len = strlen($value);
            $maxes[$col] = max($maxes[$col], $len);
            $item[$col] = $value;
        }
        $array[] = $item;
    }

    $total = 0;
    foreach ($maxes as $max) {
        $total += $max;
    }
    $line = str_repeat("-", $total + 2 + count($columns) * 3);

    $table = "{$line}\n";
    foreach ($cols as $col => $name) {
        $len = strlen($name);
        $max = $maxes[$col];
        $table .= "| {$name} " . str_repeat(" ", $max - $len);
    }
    $table .= " |\n";
    $table .= "{$line}\n";

    foreach ($array as $item) {
        foreach ($cols as $col => $name) {
            $value = $item[$col];
            $len = strlen($value);
            $max = $maxes[$col];
            $table .= "| {$value} " . str_repeat(" ", $max - $len);
        }
        $table .= " |\n";
    }
    $table .= $line;
    return $table;
}