PHP foreach with Nested Arrays
For this scenario, where you aim to access the values of a nested array, the foreach loop is an effective tool. To understand its usage, consider this example:
<code class="php">$tmpArray = [
[
'one',
[1, 2, 3]
],
[
'two',
[4, 5, 6]
],
[
'three',
[7, 8, 9]
]
];</code>
To iterate through the nested array's values, use the following nested foreach loops:
<code class="php">foreach ($tmpArray as $innerArray) {
if (is_array($innerArray)) {
foreach ($innerArray as $value) {
echo $value;
}
} else {
echo $innerArray;
}
}</code>
This approach allows you to handle both array and non-array elements within the nested array.
If you don't know the depth of your nested array, recursion is an alternative method. This code will recursively display array members with indentation:
<code class="php">function displayArrayRecursively($arr, $indent='') {
if ($arr) {
foreach ($arr as $value) {
if (is_array($value)) {
displayArrayRecursively($value, $indent . '--');
} else {
echo "$indent $value \n";
}
}
}
}</code>
For your specific case, where you want to display values from the third level only, you can modify the code as follows:
<code class="php">foreach ($tmpArray as $inner) {
if (is_array($inner)) {
foreach ($inner[1] as $value) {
echo "$value \n";
}
}
}</code>
This approach will display values from the nested array at the third level, i.e., [1, 2, 3], [4, 5, 6], and [7, 8, 9].
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