Basic problem, PHP each usage puzzled

Part 8
Echo!! each ($userAges). '
';
Echo!! each ($userAges). '
';
Echo!! each ($userAges). '
';

while (!! $a =each ($userAges)) {
echo $a [' key ']. ' ---'. $a [' $value ']. '
';
}


The results are as follows
Wu Qi---
Li Tinghui---
Hu Xueyan---
Zeng Guofan---
Li---


You can use each one to move past an element
//Why value cannot be displayed in a similar way?


foreach ($userAges as $key = $value)
{echo $key, '-------'. $value. '
';
The results are as follows
Wu Qi-------19
Li Tinghui-------27
Hu Xueyan-------135
Zeng Guofan-------136
Li-------137

Reply to discussion (solution)

echo $a [' key ']. ' ---'. $a [' value ']. '
';

Change it to this.

while (!! $a =each ($userAges)) {    echo $a [' key ']. ' ---'. $a [' value ']. '
';}

echo $a [' key ']. ' ---'. $a [' $value ']. '
';
Value has an extra $ in front

Okay, I get it.
Thank you, guys.

