PHP String Trim: Removing whitespace at string ends

Remove whitespace from string ends

trim() removes whitespace or selected characters from both ends of a string. Use ltrim() or rtrim() when only one side should change.

$value = '   PHP tutorial   ';
echo trim($value); // PHP tutorial

Remove blank space from left side of any string by using ltrim() function.

$text= " This is my text";
echo $text;
$text=ltrim($text);
echo $text;

Same way we can remove blank space from right side of any string by using rtrim() function.

$text= "This is my text ";
echo $text;
$text=rtrim($text);
echo $text;

To remove extra blank space, line break, carriage return from both sides ( left and right ) of a string we can use trim() function

$text= " This string has blank space at both sides    ";
echo $text;
$text=trim($text);
echo $text;

Use the optional character mask to remove selected trailing characters:

$str=' Hello +';
echo rtrim($str,'+');

The plus sign is removed from the end. To remove several specified trailing characters, pass a character mask.

$str=' Hello Welcome';
echo rtrim($str,'come');

Output (the rtrim() character mask strips any trailing characters found in come, not the exact word):

Hello Wel

Remove blank space present inside a string

For a user ID that explicitly disallows spaces, validate the entered value and show an error rather than silently changing a user’s chosen identifier. We can search and inform the user about this or remove the blank space from the string variable.
We will use str_replace() to remove blank space from a string.

$string = "AB CD  XYZ";
$new_string = str_replace(" ", "", $string);
echo $new_string; // ABCDXYZ

Searching for presence of white space.

For a literal space, strstr() can test whether one occurs. For any whitespace character, including tabs and newlines, use a pattern such as preg_match("/\s/", $string).

$string='ABCD  XYZ';
if (strstr($string,' ')) {
echo " Blank space is  present  ";
}else{
echo " Blank space is NOT  present ";
}

String Functions first letter of every word to capitalize by using ucwords Change all alphabetic chars to lowercase Checking all lower case or upper case chars in a string

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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panta	29-12-2014
nice tutorials , much love and appreciations

ltrim(), rtrim() and trim() Trimming the string

Remove whitespace from string ends

Remove blank space present inside a string

Searching for presence of white space.

Subhendu Mohapatra