How can strip whitespaces in PHP s variable

Question

I know this comment PHP net  I would like to have a similar tool like tr for PHP such that I can run simply  tr -d          I run unsuccessfully the function php strip whitespace by   tags trimmed   php strip whitespace  tags     I run the regex function also unsuccessfully   tags trimmed   preg replace           tags

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If you want to remove all whitespaces everywhere from  tags why not just    str replace           tags     If you want to remove new lines and such that would require a bit more

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A regular expression does not account for UTF-8 characters by default  The  s meta-character only accounts for the original latin set  Therefore  the following command only removes tabs  spaces  carriage returns and new lines     http   stackoverflow com a 1279798 54964  str preg replace    s          str     With UTF-8 becoming mainstream this expression will more frequently fail halt when it reaches the new utf-8 characters  leaving white spaces behind that the  s cannot account for   To deal with the new types of white spaces introduced in unicode utf-8  a more extensive string is required to match and removed modern white space   Because regular expressions by default do not recognize multi-byte characters  only a delimited meta string can be used to identify them  to prevent the byte segments from being alters in other utf-8 characters   x80 in the quad set could replace all  x80 sub-bytes in smart quotes    cleanedstr   preg replace          t  n  v  f  r    xC2 x85  xc2 xa0  xe1 xa0 x8e  xe2 x80  x80- x8D   xe2 x80 xa8  xe2 x80 xa9  xe2 x80 xaF  xe2 x81 x9f  xe2 x81 xa0  xe3 x80 x80  xef xbb xbf                    str      This accounts for and removes tabs  newlines  vertical tabs  formfeeds  carriage returns  spaces  and additionally from here       nextline  non-breaking spaces  mongolian vowel separator   en quad  em quad  en space  em space  three-per-em space  four-per-em space  six-per-em space  figure space  punctuation space  thin space  hair space  zero width space  zero width non-joiner  zero width joiner   line separator  paragraph separator  narrow no-break space  medium mathematical space  word joiner  ideographical space  and the zero width non-breaking space      Many of these wreak havoc in xml files when exported from automated tools or sites which foul up text searches  recognition  and can be pasted invisibly into PHP source code which causes the parser to jump to next command  paragraph and line separators  which causes lines of code to be skipped resulting in intermittent  unexplained errors that we have begun referring to as  textually transmitted diseases    Its not safe to copy and paste from the web anymore  Use a character scanner to protect your code  lol

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You can use trim function from php to trim both sides  left and right    trim  yourinputdata         Or  trim  yourinputdata     You can also use   ltrim   - Removes whitespace or other predefined characters from the left side of a string rtrim   - Removes whitespace or other predefined characters from the right side of a string   System  PHP 4 5 7 Docs  http   php net manual en function trim php

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The  s regex argument is not compatible with UTF-8 multybyte strings   This PHP RegEx is one I wrote to solve this using PCRE  Perl Compatible Regular Expressions  based arguments as a replacement for UTF-8 strings   function remove utf8 whitespace  string        return preg replace    h  u     preg replace    R  u      string         - Example Usage -  Before    string     this is a test  n and another test n r t ok   n    echo  string    this is a test  and another test          ok   echo strlen  string      result  43   After    string   remove utf8 whitespace  string    echo  string   thisisatestandanothertestok   echo strlen  string      result  28   PCRE Argument Listing  Source  https   www rexegg com regex-quickstart html  Character   Legend  Example Sample Match  t  Tab T t w 2     T     ab  r  Carriage return character   see below     n  Line feed character see below     r n    Line separator on Windows   AB r nCD    AB     CD  N  Perl  PCRE  C  PHP  R      one character that is not a line break  N  ABC  h  Perl  PCRE  C  PHP  R      Java  one horizontal whitespace character  tab or Unicode space separator        H  One character that is not a horizontal whitespace         v   NET  JavaScript  Python  Ruby  vertical tab          v  Perl  PCRE  C  PHP  R      Java  one vertical whitespace character  line feed  carriage return  vertical tab  form feed  paragraph or line separator        V  Perl  PCRE  C  PHP  R      Java  any character that is not a vertical whitespace        R  Perl  PCRE  C  PHP  R      Java  one line break  carriage return   line feed pair  and all the characters matched by  v

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There are some special types of whitespace in the form of tags  You need to use    str strip tags  str    to remove redundant tags  error tags  to get to a normal string first   And use   str preg replace    s          str    It s work for me

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Is old post but can be done like this   if  function exists  strim      function strim  str  charlist      option 0        return         if is string  str                    Translate HTML entities          return   str replace   amp nbsp        str            return   strtr  return  array flip get html translation table HTML ENTITIES  ENT QUOTES                Choose trim option         switch  option                           Strip whitespace  and other characters  from the begin and end of string             default              case 0                   return   trim  return  charlist               break                 Strip whitespace  and other characters  from the begin of string              case 1                   return   ltrim  return  charlist               break                 Strip whitespace  and other characters  from the end of string              case 2                   return   rtrim  return  charlist               break                       return  return    endif    Standard trim   functions can be a problematic when come HTML entities  That s why i wrote  Super Trim  function what is used to handle with this problem and also you can choose is trimming from the begin  end or booth side of string

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Any possible option is to use custom file wrapper for simulating variables as files  You can achieve it by using this   1  First of all  register your wrapper  only once in file  use it like session start      stream wrapper register  var   VarWrapper     2  Then define your wrapper class  it is really fast written  not completely correct  but it works    class VarWrapper     protected  pos   0    protected  content    public function stream open  path   mode   options   amp  opened path         varname   substr  path  6       global   varname       this- gt content     varname      return true        public function stream read  count         s   substr  this- gt content   this- gt pos   count        this- gt pos     count      return  s        public function stream stat          f   fopen   file     rb         a   fstat  f       fclose  f       if  isset  a 7     a 7    strlen  this- gt content       return  a          3  Then use any file function with your wrapper on var    protocol  you can use it for include  require etc  too    global    myVar     myVar    Enter tags here    data   php strip whitespace  var     myVar      Note  Don t forget to have your variable in global scope  like global    myVar

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This is an old post but the shortest answer is not listed here so I am adding it now strtr  str       gt       Another common way to  quot skin this cat quot  would be to use explode and implode like this implode    explode       str

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Sometimes you would need to delete consecutive white spaces  You can do it like this    str    My   name    is    str   preg replace    s s           str     Output   My name is

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you also use preg replace callback function   and this function is identical to its sibling preg replace except for it can take a callback function which gives you more control on how you manipulate your output    str    this is a   string    echo preg replace callback             s             function   matches                return                         str

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To strip any whitespace  you can use a regular expression   str preg replace    s          str     See also this answer for something which can handle whitespace in UTF-8 strings

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string   trim preg replace    s        string

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string   str replace           string     I believe preg replace would be looking for something like   space

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You can do it by using ereg replace    str    This Is New Method Ever     newstr   ereg replace    space             trim  str     echo  newstr     Result - ThisIsNewMethodEver

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A simple way to remove spaces from the whole string is to use the explode function and print the whole string using a for loop     text     POST  string                 a explode       text                count count  a               for  i 0  i lt  count   i                      echo  a  i

[php] How can strip whitespaces in PHP's variable?

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