loop for php code example

Example 1: php for loop

for($i = 0; $i <=10; $i++){
	echo "The index is $i";
}

Example 2: for each php

<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
    $value = $value * 2;
}
// $arr is now array(2, 4, 6, 8)

// without an unset($value), $value is still a reference to the last item: $arr[3]

foreach ($arr as $key => $value) {
    // $arr[3] will be updated with each value from $arr...
    echo "{$key} => {$value} ";
    print_r($arr);
}
// ...until ultimately the second-to-last value is copied onto the last value

// output:
// 0 => 2 Array ( [0] => 2, [1] => 4, [2] => 6, [3] => 2 )
// 1 => 4 Array ( [0] => 2, [1] => 4, [2] => 6, [3] => 4 )
// 2 => 6 Array ( [0] => 2, [1] => 4, [2] => 6, [3] => 6 )
// 3 => 6 Array ( [0] => 2, [1] => 4, [2] => 6, [3] => 6 )
?>

Example 3: php loops

#Loops

<?php
    #loops execute code a set number of times
    /*
    Types of loops
    1-For
    2-While
    3-Do..while
    4 Foreach
    */

    # For Loop usually use if you know the number of times it has to execute
    # @params -it takes an init, condition, increment
    #for($i =0;$i<=11;$i++){
    #echo 'Number: '.$i;
    #echo '<br>';
    #}
    #While loop
    # @ prams - condition
    #$i = 0;
    #while($i < 10){
    #    echo $i;
    #    echo '<br>';
    #    $i++;
    #}
    # Do...while loops
    #@prapms - condition
    /*$i = 0;
    do{
        echo $i;
        echo '<br>';
        $i++;
        }
        while($i < 10);*/
    # Foreach  --- is for arrays
    
    # $people = array('Brad', 'Jose', 'William');
    #     foreach($people as $person){
    #     echo $person;
    #     echo '<br>';
    # }
    $people = array('Tony' => '[email protected]',
        'Jose' => '[email protected]','William' => '[email protected]');
    
     foreach($people as $person => $email){
        echo $person.': '.$email;
        echo '<br>';
}
?>

Example 4: how create loop php

for (initialization; condition; increment){
   code to be executed;
}
//Example
<?php
    $a = 0;
    $b = 0;
 for( $i = 0; $i<5; $i++ )
    {
        $a += 10;
        $b += 5;
    }    
echo ("At the end of the loop a = $a and b = $b" );
?>
//.......................................//
  do {
   code to be executed;
}
while (condition);
//Example
<?php
     $i = 0;
    $num = 0;
         
  do {
       $i++;
     }
         
  while( $i < 10 );
 echo ("Loop stopped at i = $i" );
?>