Replace the last comma with an & sign
I have searched everywhere but can't find a solution that works for me.
I have the following:
$bedroom_array = array($studio, $one_bed, $two_bed, $three_bed, $four_bed);
For this example lets say:
$studio = '1';
$one_bed = '3';
$two_bed = '3';
I then use the implode function to put a comma in between all the values:
$bedroom_list = implode(", ", array_filter($bedroom_array));
echo $bedroom_list;
This then outputs:
1, 2, 3
What I want to do is find the开发者_运维百科 last comma in the string and replace it with an &, so it would read:
1, 2 & 3
The string will not always be this long, it can be shorter or longer, e.g. 1, 2, 3, 4 and so on. I have looked into using substr but am not sure if this will work for what I need?
Pop off the last element, implode the rest together then stick the last one back on.
$bedroom_array = array('studio', 'one_bed', 'two_bed', 'three_bed', 'four_bed');
$last = array_pop($bedroom_array);
$string = count($bedroom_array) ? implode(", ", $bedroom_array) . " & " . $last : $last;
Convert &
to the entity &
if necessary.
if you have comma separated list of words you may use:
$keyword = "hello, sadasd, sdfgdsfg,sadfsdafsfd, ssdf, sdgdfg";
$keyword = preg_replace('/,([^,]*)$/', ' & \1', $keyword);
echo $keyword;
it will output: hello, sadasd, sdfgdsfg,sadfsdafsfd, ssdf & sdgdfg
A one-liner alternative, that will work for any size array ($b = $bedroom_array):
echo count($b) <= 1 ? reset($b) : join(', ', array_slice($b, 0, -1)) . " & " . end($b);
strrpos finds the last occurrance of a specified string. $str = '1, 2, 3';
$index = strrpos( $str, ',' );
if( $index !== FALSE )
$str[ $index ] = '&';
function fancy_implode($arr){
array_push($arr, implode(' and ', array_splice($arr, -2)));
return implode(', ', $arr);
}
I find this easier to read/understand and use
- Does not modify the original array
- Does not use regular expressions as those may fail if strings in the array contain commas, there could be a valid reason for that, something like this:
array('Shirts (S, M, L)', 'Pants (72 x 37, 72 x 39)');
- Delimiters don't have to be of the same length as with some of the other solutions
$bedroom_list = implode(", ", array_filter($bedroom_array));
$vars = $bedroom_list;
$last = strrchr($vars,",");
$last_ = str_replace(",","&",$last);
echo str_replace("$last","$last_",$vars);
<?php
$string = "3, 4, 5";
echo $string = preg_replace('/,( \d)$/', ' &\1', $string);
?>
Here's another way to do the replacement with a regular expression using a positive lookahead which doesn't require a backreference:
$bedroom_list = preg_replace('/,(?=[^,]*$)/',' &', implode(', ', $bedroom_array));
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