How to remove spaces on both sides of a string in php?

php method to remove spaces on both sides of a string: 1. Directly use the trim() function to remove spaces at both ends of a string; 2. Use rtrim() and ltrim() to remove the right and left sides of a string respectively. Spaces; 3. Use the mb_ereg_replace() function with regular expressions to replace and remove spaces.

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php removes spaces on both sides of the string

The first method: through the function that comes with php

";
echo rtrim($str)."
";
echo ltrim($str)."
";
?>

The second method: through regular expression Formula replacement, more powerful

php removes spaces at the beginning and end of the string (including full-width)

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