I have the following error;
Note: Array to string conversion in [file_path] on line 919
which relates to this line of code where I'm trying to assign this string as a value in an array
$contents[11] = "$hours:$minutes:$seconds\n$ca_1[remaining_time]\n$h:$m:$s";
Why am I getting this error, and how do I resolve it?
It's a bad practice to interpolate string this way because it makes the code very difficult to read, so you should rather use "{$h}" instead of "$h".
As Terminus mentioned in comments, depending on the PHP version,
echo "$ca_1[remaining_time]"
Does not necessarily give a
PHP Notice: Use of undefined constant
Like echo $ca_1[remaining_time] would. But since that didn't work for you, you'd better quote that like ['remaining_time'].
You might also find some interesting things on this topic here.
Second, use curvy braces to explicitly tell what you want to insert:
$contents[11] = "$hours:$minutes:$seconds\n{$ca_1['remaining_time']}\n$h:$m:$s";
This really improves readability.
"$ca_1[remaingingTime]" does not give a noticeTry:
$contents[11] = $hours . ':' . $minutes . ':' . $seconds + "\n" . $ca_1['remaining_time'] . "\n " . $h . ':' . $m . ':' . $s";
If this still fails, check your variables. Maybe one of them is an array!?
., not a plus +.
Notenot error, it seems. it is a literal string or you need to evaluate variables inside that string ? use single quote'for literal. one of the variable inside is array. most probably$ca_1, use it like alexander suggested,$ca_1['remaining_time'].