How can PHP be used to iterate through data entries in an array and check for specific conditions, such as empty or zero values?

When iterating through data entries in an array in PHP, you can use a foreach loop to access each element. To check for specific conditions, such as empty or zero values, you can use conditional statements within the loop. For example, you can use if statements to check if a value is empty (using empty() function) or zero. By combining iteration with conditional checks, you can effectively filter and process data entries based on your requirements. 

$data = [1, 0, '', 5, 0, 10];

foreach ($data as $value) {
    if (empty($value)) {
        echo "Empty value found\n";
    }

    if ($value == 0) {
        echo "Zero value found\n";
    }
}

Keywords

PHP array iteration empty values zero values

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