array_loop_condition.php

<?php


$rows1 = [['id' => 1], ['id' => 2]];
$rows2 = [[]];
$rows3 = [];


function pattern1($rows)
{
    foreach ($rows as $row) {
        if (!isset($row['id'])) {
            echo "0件ですわあ";
        } else {
            echo $row['id'] . ':';
        }
    }

    echo PHP_EOL;
}

pattern1($rows1);
pattern1($rows2);
pattern1($rows3);

$row1と$row2はforeachを通るけど、$row3はforeach自体通らない