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I have trouble with error

Strict Standards: Only variables should be passed by reference in C:\xampp\htdocs\tanthanh\includes\cls_template.php on line 406"

And line 406 in cls_template file

$tag_sel = array_shift(explode(' ', $tag));
switch ($tag_sel)

What do I need to correct?

halfer
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Duong Dung
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    `array_shift()` must write back to an array variable, so you need to store the results of the `explode()` in a variable and pass that instead. – halfer Jul 18 '15 at 14:16
  • possible duplicate of ["Strict Standards: Only variables should be passed by reference" error](http://stackoverflow.com/questions/9848295/strict-standards-only-variables-should-be-passed-by-reference-error) – CBroe Jul 18 '15 at 14:18

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