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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.
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