Questions about the Foreach Loop in PHP

$a = ' 1=a # 2=b # 3=c # 4=d '; $alist = explode (' # ', $a), foreach ($alist as $key + = $value) {$arr =explode (' = ', $value); $blist [$arr [0]]= $arr [1];echo] $blist [$key] ";}

echo "$blist [$key]"; Only output ABC is missing the last one each time how to output ABCD

Reply to discussion (solution)

Direct echo $arr [1]; No, it's okay.

Be sure to use $blist output words should be written as echo "$blist [$key +1]"; Because your $blist array index is starting from 1 to 4

Oh, wrong, it should be echo $blist [$key +1];

Key is 0-3
and $arr[0] is 1-4
So different, change it to this.

$a = ' 1=a # 2=b # 3=c # 4=d '; $alist = explode (' # ', $a), foreach ($alist as $key + = $value) {    $arr =explode (' = ', $value); c1/> $blist [$arr [0]-1]= $arr [1];    echo "$blist [$key]";}

$arr [1] can actually output ABCD to solve this problem.

So how do you write the output C? $arr [1[3]]? It seems wrong.

Key is 0-3
and $arr[0] is 1-4
So different, change it to this.

$a = ' 1=a # 2=b # 3=c # 4=d '; $alist = explode (' # ', $a), foreach ($alist as $key + = $value) {    $arr =explode (' = ', $value); c4/> $blist [$arr [0]-1]= $arr [1];    echo "$blist [$key]";}

$arr [1] can actually output ABCD to solve this problem.

So how do you write the output C? $arr [1[3]]? It seems wrong.

Direct echo $arr [1]; No, it's okay.

Be sure to use $blist output words should be written as echo "$blist [$key +1]"; Because your $blist array index is starting from 1 to 4

$arr [1] can actually output ABCD to solve this problem.

So how do you write the output C? $arr [1[3]]? It seems wrong.

That is, outputting a single data

Echo $blist [3]; C

Notice the difference between the associative array and the subscript array

$arr [1] can actually output ABCD to solve this problem.

So how do you write the output C? $arr [1[3]]? It seems wrong.

Key is 0-3
and $arr[0] is 1-4
So different, change it to this.

$a = ' 1=a # 2=b # 3=c # 4=d '; $alist = explode (' # ', $a), foreach ($alist as $key + = $value) {    $arr =explode (' = ', $value); c1/> $blist [$arr [0]-1]= $arr [1];    echo "$blist [$key]";}

$arr [1] can actually output ABCD to solve this problem.

So how do you write the output C? $arr [1[3]]? It seems wrong.

Echo $blist [2];

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