Why does this php array function gives me an error

Question

if (array_key_exists('icon_path', $changedAttributes)) {
    $iconFile = $changedAttributes["icon_path"];
}

Why does $iconFile = $changedAttributes["icon_path"]; line gives me below error in php 7.2? Even though I change it to single quotations ['icon_path'] doesn't solve the problem.

syntax error, unexpected '' (T_ENCAPSED_AND_WHITESPACE), expecting '-' or identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING)

But in php 7.4 there's no problem at all.

I checked my code with this version checker https://www.piliapp.com/php-syntax-check/ 7.2 gives me this error but 7.4 works fine.

Is it possible that `icon_path` is actually empty? Is might well _exist_ but if it's empty, you will be trying to access `$changedAttributes[""]` which of course will give you that error... — Stuart, Dec 08 '20 at 11:07
Please, always show the real error message ALL OF IT and the real code, enough of that so we are sure we are looking at the right line in the right file :) — RiggsFolly, Dec 08 '20 at 11:15
@Stuart in that case they should get some sort of runtime error (and more likely saying undefined index), but not a parse error. — CBroe, Dec 08 '20 at 11:29
Does this answer your question? [syntax error, unexpected T\_ENCAPSED\_AND\_WHITESPACE, expecting T\_STRING or T\_VARIABLE or T\_NUM\_STRING](https://stackoverflow.com/questions/8400018/syntax-error-unexpected-t-encapsed-and-whitespace-expecting-t-string-or-t-vari) — El_Vanja, Dec 08 '20 at 11:31
I checked my code with this version checker https://www.piliapp.com/php-syntax-check/ 7.2 gives me this error but 7.4 works fine. — devnc, Dec 09 '20 at 00:57
Does this answer your question? [HEREDOC interfering with code indentation](https://stackoverflow.com/questions/2305869/heredoc-interfering-with-code-indentation) — user3783243, Dec 09 '20 at 02:02

score 0 · Accepted Answer · answered Dec 09 '20 at 01:56

It was an indent issue. My code has below JavaScript code.

public function reloadPageOnEdit()
{
    return <<<JSCRIPT
        <script>
            function openWindowReload(link) {
                var href = link.href;
                
                document.location.reload(true);
                window.open(href,'_self');
            }
        </script>
        JSCRIPT;
}

and I indented it fully left. It solved the problem. Even there's no issue in 7.4 but 7.2. I got confused because the code failed on somewhere else.

    public function reloadPageOnEdit()
    {
        return <<<JSCRIPT
<script>
    function openWindowReload(link) {
        var href = link.href;
        
        document.location.reload(true);
        window.open(href,'_self');
    }
</script>
JSCRIPT;
    }

The script tags can be indented as you like. The only issue is with the identifier line `JSCRIPT;`. See the warning here, https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc This was changed in 7.3 so could be why you weren't seeing in 7.4. — user3783243, Dec 09 '20 at 02:01
@user3783243 thanks, properly indenting `JSCRIPT;` is enough. — devnc, Dec 09 '20 at 02:27

Why does this php array function gives me an error

1 Answers1