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How to add spaces around substring if spaces don't exist yet?

Example input line: test:)test:)test:) :) test:p test
Required output line:test :) test :) test :) :) test :p test

As you can see in the above example, I want to parse a line and create an output line with spaces added around all the predefined emoticon codes.

I tried to do this with a few loops, but it ended up not working 100% as expected, and it was terribly slow on large documents.

So, I am wondering what would be the best and most effective way to do this kind of PHP parsing?

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8 answers

Substitution replacement:

preg_replace("/\s\s+/", " ", 
    str_replace( Array( ":)", ":p" ),
        Array( " :) ", " :p " ), $str) );
+2
source 
<?php

$lspace =   str_replace(":"," :","test:)test:)test:) :) test:p");
$rspace =    str_replace(")",") ",$lspace);
$out    =    preg_replace("/\s\s+/"," ",$rspace);


echo $out;
?>

output: test :) test :) test :) :) test :p

+1
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str_replace. PHP str_replace , :

$input = 'test:)test:)test:) :) test:p test';
$smileys = array( ':)', ':p' );
$smileys_with_spaces = array( ' :)', ' :p' );
$output = str_replace( $smileys_with_spaces, $smileys, $input ); // test:) :) -> test:):)
$output = str_replace( $smileys, $smileys_with_spaces, $input ); // test:):) -> test :) :)
0

Try:

$str = "test:)test:)test:) :) test:p test";
$str = preg_replace('/(?<=[a-z])(?=[^a-z\s])|(?<=[^a-z]{2})(?=[a-z])/', ' ', $str);
0

N

$smile = array(':)', ':p');

//Escape smiley chars for use in rx
foreach($smile as &$s) {
    $s = preg_quote($s, '/');
}unset($s);

$rx = implode('|', $smile);

$str = 'test:)test:)test:) :) test:p test';

$str = preg_replace('/ *('.$rx.') */', ' $1 ', $str);
$str = preg_replace('/('.$rx.') +/', '$1 ', $str);

echo $str;
0

/, :

$str = ':):)test:)test:)test:) :) test:p:) test';
$codes = array(
    ':)', ':p', // Add smileys here.
);

// We build the $regexp automatically
$regexp = array();
foreach($codes as $smiley)
    $regexp[] = preg_quote($smiley, '#');
$regexp = implode('|', $regexp);
// Afterwards, we might replace the above with $regexp = 'VERYCOMPLICATEDSYNTAX';

// Split the string at smileys, trimming the smileys as we go,
// and returning an array of smiley-and-non-smiley parts, except for empty ones
$parts = preg_split("#\s*($regexp)\s*#", $str, -1,
    PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);

// The new delimiter is a single space.
$str = implode(' ', $parts);

, \s ; , . , "\s" " ".

0

,

$patterns = array();
$replacements = array();

$str = ':) test :)test:) test :)';

$smileys = array(':)', ':p');

foreach($smileys as &$s) {
    $s = preg_quote($s, '/');
}unset($s);
$escaped_smiley = implode('|', $smileys);

$patterns[] = '/([^\s])('.$escaped_smiley.')([^\s])/'; // no spaces
$patterns[] = '/([\s])('.$escaped_smiley.')([^\s])/';  // space on left
$patterns[] = '/([^\s])('.$escaped_smiley.')([\s])/';  // space on right

$patterns[] = '/^('.$escaped_smiley.')([\s])/';   // line starting, space succeding
$patterns[] = '/^('.$escaped_smiley.')([^\s])/';  // line starting, no space
$patterns[] = '/([\s])('.$escaped_smiley.')$/';   // line ending, space preceeding
$patterns[] = '/([^\s])('.$escaped_smiley.')$/';  // line ending, no space

$replacements[] = '$1 $2 $3'; // no spaces 
$replacements[] = '$1$2 $3';  // space on left
$replacements[] = '$1 $2$3';  // space on right

$replacements[] = ' $1$2';    // line starting
$replacements[] = ' $1 $2';   // line starting
$replacements[] = '$1$2 ';    // line ending
$replacements[] = '$1 $2 ';   // line ending


$result = preg_replace($patterns, $replacements, $str);
echo str_replace(' ', '^', $result);

[ , @Prinzhorn]

0

If you haven't solved the problem yet, I came up with a solution that might work. First explode the line with spaces as delimiters, replace emoticons with additional spaces and divide them by implode.

Check the php script to implement.

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