PHP Foreach loop

The basic syntax of "Foreach" Loop in PHP is as follows:

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foreach ($array as $value) {
    // Code to be executed for each element in $array
}
 

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$colors = array("Red", "Green", "Blue");

foreach ($colors as $color) {
    echo $color . " ";
}
 

• In this example, we have an indexed array called $colors with three elements.
• The foreach loop is used to iterate over each element in the array.
• In each iteration, the current element's value is assigned to the variable $color.
• The loop then executes the code block inside, which echoes the value of $color followed by a space.
• The loop iterates through all elements in the array, printing "Red Green Blue ".

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$person = array("Name" => "John", "Age" => 30, "Location" => "New York");

foreach ($person as $key => $value) {
    echo "$key: $value\n";
}
 

• Here, we have an associative array called $person with key-value pairs representing personal information.
• The foreach loop iterates over each element in the array.
• In each iteration, the current key is assigned to the variable $key, and the current value is assigned to the variable $value.
• The loop executes the code block inside, which displays the key and its corresponding value.
• The loop iterates through all key-value pairs, producing output like:
  Name: John
  Age: 30
  Location: New York

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$students = array(
    array("Name" => "Alice", "Grade" => "A"),
    array("Name" => "Bob", "Grade" => "B"),
    array("Name" => "Charlie", "Grade" => "C")
);

foreach ($students as $student) {
    echo $student["Name"] . " got a " . $student["Grade"] . " grade.\n";
}

• In this example, we have a multidimensional array called $students, where each element is an associative array representing a student's name and grade.
• The foreach loop iterates over each element (student) in the outer array.
• In each iteration, the current student (an associative array) is assigned to the variable $student.
• The code block inside the loop uses $student to access the "Name" and "Grade" keys and displays the student's name and grade.
• The loop iterates through all students, providing output like:
  Alice got a A grade.
  Bob got a B grade.
  Charlie got a C grade.

These examples illustrate how PHP foreach loops simplify the process of iterating through arrays and associative arrays, making it easier to work with data structures in your PHP code.