如何在PHP中的任何标点符号和标记之间添加空格？ [关闭]

Question

I want to add a space in between each punctuation symbol and token, so that the text looks something like this:

 " in dreams " might keep you awake at night , but not because of its creepy imagery , bizarre visual style or story about a clairvoyant madman who lures young girls to their untimely deaths . 
no , the source of potential sleeplessness here lies within the movie's brutally squandered potential , the least of which is an admittedly nifty premise - even by tired serial killer genre standards . 
the big letdown , however , comes upon the realization that this 100-minute head-scratcher was masterminded by neil jordan , the man behind " the crying game . " 
he's no stranger to cinematic weirdness , but this nutty nonsense really pushes the envelope . 
things start out strong enough , with cinematographer darius khondji's stunning camera work guiding viewers into the bowels of a underwater ghost town during a creepy prologue that establishes a notably grim tone right off the bat . 
this eerie opulence remains a dazzling display of showmanship throughout the entire film - there's even something macabre about the way khondji photographs a rustic , seemingly innocent new england autumn - but if there ever was a film that didn't deserve so good a polish , it's this one .

Note that the input string could be, for example, "This is a simple - straightforward P.H.P. Program! Isn't it?"

The output should be: " This is a simple - straightforward P . H . P . Program ! Isn ' t it ? "

Punctuation characters in this case are anything that is not a letter or a number.

Answer 1

I suggest not to use "hungry" regular expression engine in your case, simple string replace will do the job:

<?php
$input_string = "bla bla,bla.another bla;";
//you can extend this array as you wish
$punctoations = array(".",",",":",";");  
//your replacements, same order as above array    
$replacements = array (" . "," , "," : "," ; "); 
echo str_replace($punctoations, $replacements, $input_string);
?>

See how more info in PHP documentation.