How to remove spaces and newlines at the beginning and end of a string in php

In PHP, you can use the trim() function to remove spaces and newlines at the beginning and end of a string. This function can remove whitespace characters (or other characters) at the beginning and end of a string. The syntax format is "trim(string) ".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In PHP, you can use trim () function to remove spaces and newlines at the beginning and end of a string.

<?php
header("Content-type:text/html;charset=utf-8");
$str = " PHP中文网 \n";
echo "原字符串：";
var_dump($str);

echo "去掉首尾的空格和换行后：";
var_dump(trim($str));

?>

Output:

原字符串：
string ' PHP中文网 
' (length=15)
去掉首尾的空格和换行后：
string 'PHP中文网' (length=12)

Explanation:

trim() function can remove the blanks at the beginning and end of the string characters (or other characters). The syntax format is as follows:

trim(string,charlist)

Parameter description is as follows:

• string: string to be processed;

• character_mask: available Optional parameter is used to specify all characters to be removed. You can also use ".." to list a range of characters.

If the $character_mask parameter is not specified, the trim() function will remove the following characters:

• " ": ordinary space character;

• "\t": tab character;

• "\n": newline character;

• "\r": carriage return character;

• "\0": null byte character;

• "\x0B": vertical Tabs.

Recommended learning: "PHP Video Tutorial"

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