About PHP Notice: A non well formed numeric value encountered, how much do you know_PHP Tutorial

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A non well formed numeric value encountered=>

From the literal meaning, you can roughly get a glimpse of some meaning: encountering a numerical value that is not well formed;

ok, we guess that one of the parameter types may be wrong. We need to pass in a numeric type but it may actually be a string.

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So, to solve this problem, first check whether the parameter types passed in your custom function are consistent with those actually used.

For example: bool imagecopymerge ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int$src_x , int $src_y , int $src_w , int $src_h , int $pct );

Several of the parameters specifying position, width and height are all int (integer). If you accidentally pass in the 'px' unit, an error will be reported.

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You can process the data in many ways before passing it in, such as:

$str = '1px';

echo intval($str);　　  //1

echo rtrim($str, 'px'); //1

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