How to remove excess whitespace in a paragraph?

 $string = "There   are lot of excess space   in  this paragraph. "; 
How can you  remove them easily using a regular expression ?

Default Asked on June 15, 2016 in PHP.
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    $string = preg_replace('/\s\s+/', ' ', $string);
    

     

    Default Answered on June 15, 2016.
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