Trim with PHP

问题:

I have a sentence like this.

1       2     3   4

As you see, in between 1 2 and 3 text, there are extra spaces. I want the output with only one space between them. so my output will be 1 2 3 4.

If I use trim, it can only remove white space, but not that   How can I use PHP trim function to get the output like this?

回答1:

$str = "1 $nbsp;     2     3   4";
$new_str = str_replace(" ", '', $str);

回答2:

Found this at php.net, works great:

$myHTML = " abc"; 
$converted = strtr($myHTML, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES))); 
trim($converted, chr(0xC2).chr(0xA0));

Source: http://php.net/manual/en/function.trim.php#98812

回答3:

A more inclusive answer for those who want to just do a trim:

$str = trim($str, " \t\n\r\0\x0B\xC2\xA0");

Same trim handling   html entities:

$str = trim(html_entity_decode($str), " \t\n\r\0\x0B\xC2\xA0");

This html_entity_decode and trim interaction is outlined in the PHP docs here: http://php.net/manual/en/function.html-entity-decode.php#refsect1-function.html-entity-decode-notes

回答4:

$str = " abc ";

echo trim($str, "\xC2\xA0"); //abc

回答5:

if your string actually has "  ",

$str="1       2     3   4";
$s = str_replace("  ","",$str);
print $s;

回答6:

A little late to answer but hopefully might help someone else. The most important while extracting content from html is to use utf8_decode() in php. Then all other string operations become a breeze. Even foreign characters can be replaced by directly copy pasting characters from browser into the php code. The following function replaces   with a space. Then all extra white spaces are replaced with a single white space using preg_replace(). Leading and trailing white spaces are removed in the end.

function clean($str)
{       
    $str = utf8_decode($str);
    $str = str_replace(" ", " ", $str);
    $str = preg_replace('/\s+/', ' ',$str);
    $str = trim($str);
    return $str;
}

$html = "1 $nbsp;     2     3   4";
$output = clean($html);
echo $output;

1 2 3 4

回答7:

echo str_replace ( " ", "", "1       2     3   4" );

just remember you need to echo out the result of the str_replace and you alo dont need to worry about white spaces a the browser will only show one white space.