<?php foreach($str as $val){ }
Standard input is empty
array(3) {
[0]=>
string(4) "chr1"
[1]=>
string(5) "22222"
[2]=>
string(6) "333333"
}
array(3) {
[0]=>
string(4) "chr1"
[1]=>
string(5) "22222"
[2]=>
string(6) "333333"
}
array(3) {
[0]=>
string(4) "chr1"
[1]=>
string(5) "22222"
[2]=>
string(6) "333333"
}
array(3) {
[0]=>
string(4) "chr1"
[1]=>
string(5) "22222"
[2]=>
string(5) "33333"
}