/
foreachLoop.002.phpt
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foreachLoop.002.phpt
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--TEST--
Foreach loop tests - modifying the array during the loop.
--FILE--
<?php
echo "\nDirectly changing array values.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>$v) {
$a[$k]="changed.$k";
var_dump($v);
}
var_dump($a);
echo "\nModifying the foreach \$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>$v) {
$v="changed.$k";
}
var_dump($a);
echo "\nModifying the foreach &\$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>&$v) {
$v="changed.$k";
}
var_dump($a);
echo "\nPushing elements onto an unreferenced array.\n";
$a = array("original.1","original.2","original.3");
$counter=0;
foreach ($a as $v) {
array_push($a, "new.$counter");
//avoid infinite loop if test is failing
if ($counter++>10) {
echo "Loop detected\n";
break;
}
}
var_dump($a);
echo "\nPushing elements onto an unreferenced array, using &\$value.\n";
$a = array("original.1","original.2","original.3");
$counter=0;
foreach ($a as &$v) {
array_push($a, "new.$counter");
//avoid infinite loop if test is failing
if ($counter++>10) {
echo "Loop detected\n";
break;
}
}
var_dump($a);
echo "\nPopping elements off an unreferenced array.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $v) {
array_pop($a);
var_dump($v);
}
var_dump($a);
echo "\nPopping elements off an unreferenced array, using &\$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as &$v) {
array_pop($a);
var_dump($v);
}
var_dump($a);
?>
--EXPECT--
Directly changing array values.
string(10) "original.1"
string(10) "original.2"
string(10) "original.3"
array(3) {
[0]=>
string(9) "changed.0"
[1]=>
string(9) "changed.1"
[2]=>
string(9) "changed.2"
}
Modifying the foreach $value.
array(3) {
[0]=>
string(10) "original.1"
[1]=>
string(10) "original.2"
[2]=>
string(10) "original.3"
}
Modifying the foreach &$value.
array(3) {
[0]=>
string(9) "changed.0"
[1]=>
string(9) "changed.1"
[2]=>
&string(9) "changed.2"
}
Pushing elements onto an unreferenced array.
array(6) {
[0]=>
string(10) "original.1"
[1]=>
string(10) "original.2"
[2]=>
string(10) "original.3"
[3]=>
string(5) "new.0"
[4]=>
string(5) "new.1"
[5]=>
string(5) "new.2"
}
Pushing elements onto an unreferenced array, using &$value.
Loop detected
array(15) {
[0]=>
string(10) "original.1"
[1]=>
string(10) "original.2"
[2]=>
string(10) "original.3"
[3]=>
string(5) "new.0"
[4]=>
string(5) "new.1"
[5]=>
string(5) "new.2"
[6]=>
string(5) "new.3"
[7]=>
string(5) "new.4"
[8]=>
string(5) "new.5"
[9]=>
string(5) "new.6"
[10]=>
string(5) "new.7"
[11]=>
&string(5) "new.8"
[12]=>
string(5) "new.9"
[13]=>
string(6) "new.10"
[14]=>
string(6) "new.11"
}
Popping elements off an unreferenced array.
string(10) "original.1"
string(10) "original.2"
string(10) "original.3"
array(0) {
}
Popping elements off an unreferenced array, using &$value.
string(10) "original.1"
string(10) "original.2"
array(1) {
[0]=>
string(10) "original.1"
}