- array_splice: documentation ( source)
- print_r: documentation ( source)
<?php
$array = array("a", "b", "c", "d", "e", "f");
foreach ( $array as $key => &$value ) {
echo "$key: $value\n";
if ( $value == "b" ) array_splice($array, $key, 1, array("x", "y"));
}
print_r($array);