php - An Error Anonymous functions example -

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• php parse/syntax errors; , how solve them? 11 answers

as decided take @ anonymous function, wrote example practice getting error there no warnings found in php storm ide.

whats happening there?

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actual code

$functioninstant = create_function('$a,$b', 'return (strlen($a) - strlen($b))'); $list = array('really long string', 'this', 'middle', 'large'); usort($list, $functioninstant);  print_r($list); 

error message

parse error: syntax error, unexpected '}' in functions.php(87): runtime-created function on line 1

warning: usort() expects parameter 2 valid callback, no array or string given in functions.php on line 89

assuming moderately recent version of php, use anonymous function, eg

usort($list, function($a, $b) {     return strlen($a) - strlen($b); }); 

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your actual error because missing semi-colon in function body string. should be

$functioninstant = create_function('$a,$b', 'return strlen($a) - strlen($b);');