Strange problem max function cannot recognize parameters

Strange problem max function cannot recognize parameter PHP

$chrw = $this->GetArrStringWidth($chars, '', '', 0, true);array_walk($chrw, array($this, 'getRawCharWidth'));$maxchwidth = max($chrw);

The following error is reported: max () [function. max]: Array must contain at least one element
I output $ chrw content before the max function, which is array ([1] => 6.35 [2] => 6.35 [3] => 6.35)

Reply to discussion (solution)

If I write max (array (6.35, 6.35, 6.35), the error disappears.

Do you know what's going on ?? Why can't the max function recognize this parameter?

This is tcpdf code. I did not report an error locally, but I reported an error on the server.

$chrw = $this->GetArrStringWidth($chars, '', '', 0, true);array_walk($chrw, array($this, 'getRawCharWidth'));$maxchwidth = max($chrw);

The following error is reported: max () [function. max]: Array must contain at least one element
I output $ chrw content before the max function, which is array ([1] => 6.35 [2] => 6.35 [3] => 6.35)
In the max function, variables are allowed. If an error is returned, the array in the result is incorrect. array ([1] => 6.35 [2] => 6.35 [3] => 6.35)
I don't think this array is correct.

Array must contain at least one element
The array must contain at least one element.

In the max function, variables are allowed. If an error is returned, the array in the result is incorrect. array ([1] => 6.35 [2] => 6.35 [3] => 6.35)
I don't think this array is correct.

Sorry, I wrote it.
Array
(
[0] = & gt; 6.35
[1] => 6.35.
[2] => 6.35.
)

Array must contain at least one element
The array must contain at least one element.
The array is like this.
Array
(
[0] = & gt; 6.35
[1] => 6.35.
[2] => 6.35.
)
The array contains elements.

Var_dump ($ chrw) to see what it is

Var_dump ($ chrw) to see what it is

Array (3) {[0] => float (6.35) [1] => float (6.35) [2] => float (6.35 )}

Php won't be wrong. He says it's empty, so it's empty!

$ Chrw = $ this-> GetArrStringWidth ($ chars, '','', 0, true );
Var_dump ($ chrw );
Array_walk ($ chrw, array ($ this, 'getrawcharwidth '));
Var_dump ($ chrw );
$ Maxchwidth = max ($ chrw );

Take a look

Php won't be wrong. He says it's empty, so it's empty!

$ Chrw = $ this-> GetArrStringWidth ($ chars, '','', 0, true );
Var_dump ($ chrw );
Array_walk ($ chrw, array ($ this, 'getrawcharwidth '));
Var_dump ($ chrw );
$ Maxchwidth = max ($ chrw );

Take a look

I did what you said and read them separately, but all the output is
Array (3) {[0] => float (6.35) [1] => float (6.35) [2] => float (6.35 )}

Php won't be wrong. He says it's empty, so it's empty!

$ Chrw = $ this-> GetArrStringWidth ($ chars, '','', 0, true );
Var_dump ($ chrw );
Array_walk ($ chrw, array ($ this, 'getrawcharwidth '));
Var_dump ($ chrw );
$ Maxchwidth = max ($ chrw );

Take a look

Array (3) {[0] => float (6.35) [1] => float (6.35) [2] => float (6.35)} array (3) {[0] => float (6.35) [1] => float (6.35) [2] => float (6.35 )}

Even though max reports an error, my echo $ maxchwidth is 6.35.

Spiritual events
And the local server is correct.

Are all var_dump tests performed locally? Test it on the faulty server.

Even though max reports an error, my echo $ maxchwidth is 6.35.

Then you need to check whether there are other places where max () is used. if not, an error is reported elsewhere.

Spiritual events
And the local server is correct.

Are all var_dump tests performed locally? Test it on the faulty server.
Well, it's tested on the server.

Even though max reports an error, my echo $ maxchwidth is 6.35.

Then you need to check whether there are other places where max () is used. if not, an error is reported elsewhere.

Max () [function. max]: Array must contain at least one elementError File: \ supported des \ plugin \ tcpdf. php at 6301 line.
> Report_issue
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Even though max reports an error, my echo $ maxchwidth is 6.35.

Then you need to check whether there are other places where max () is used. if not, an error is reported elsewhere.
If the number of rows is specified

Before maxcompute, use array_values ($ chrw) to process the array.

Thank you. I don't know what's going on. I can do it myself today.