Definition and Usage
The trim () function removes white-space characters and other predefined characters from both ends of the string.
Grammar
Trim (string,charlist) parameter description
string is required. Specifies the string to check.
Charlist is optional. Specifies the string to convert. If this argument is omitted, all of the following characters are removed:
Copy CodeThe code is as follows:
"+"-NULL
"\ T"-tab
"\ n"-New line
"\x0b"-Vertical list character
"\ r"-Enter
""-Plain white space character
Example 1
Copy CodeThe code is as follows:
$STR = "Use function trim to remove whitespace characters at both ends of the string";
$str 1 = Trim ($STR); echo "Before processing". strlen ($STR). " Characters ";
echo "
";
echo "
";
echo "has been processed with the trim function". strlen ($str 1). " Characters ";
?>
Output:
39 characters before processing 34 characters after using the PHP function trim ()
Example 2
Copy CodeThe code is as follows:
$str = "# #使用函数trim去掉字符串两端特定字符 # # #;
$str 1 = Trim ($str, "#"); When you pass in the second parameter for function trim, Trim deletes the # character at both ends of the string $str
echo $str. "
";
echo $str 1;
?>
Output:
# #使用PHP函数trim () remove specific characters at both ends of a string # # # # Use function trim to remove specific characters at both ends
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