PHP foreach 구문 사용법 > 개발

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PHP foreach 구문 사용법


[code]
/* foreach example 1: value only */

$a = array(1, 2, 3, 17);

foreach ($a as $v) {
    echo "Current value of \$a: $v.\n";
}

/* foreach example 2: value (with its manual access notation printed for illustration) */

$a = array(1, 2, 3, 17);

$i = 0; /* for illustrative purposes only */

foreach ($a as $v) {
    echo "\$a[$i] => $v.\n";
    $i++;
}

/* foreach example 3: key and value */

$a = array(
    "one" => 1,
    "two" => 2,
    "three" => 3,
    "seventeen" => 17
);

foreach ($a as $k => $v) {
    echo "\$a[$k] => $v.\n";
}

/* foreach example 4: multi-dimensional arrays */
$a = array();
$a[0][0] = "a";
$a[0][1] = "b";
$a[1][0] = "y";
$a[1][1] = "z";

foreach ($a as $v1) {
    foreach ($v1 as $v2) {
        echo "$v2\n";
    }
}

/* foreach example 5: dynamic arrays */

foreach (array(1, 2, 3, 4, 5) as $v) {
    echo "$v\n";
}
[/code]



[code]
$employee_list = array(
    'Programmer' => 'Edward',
    'Designer' => 'Alex'
);
 
foreach($employee_list as $row)
{
    echo $row."<br/>";
}
[/code]

[code]
$employee_list = array(
    'Programmer' => 'Edward',
    'Designer' => 'Alex'
);
 
foreach($employee_list as $key => $value)
{
    echo $key." : ".$value."<br/>";
}
[/code]



* 참고
https://www.php.net/manual/en/control-structures.foreach.php
https://extbrain.tistory.com/24

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