PHP Delete the left and right side of the space method, php deleted _php Tutorial

PHP Delete the left and right side of the space method, PHP remove Blank Space

This article explains how PHP removes the left and right spaces. Share to everyone for your reference. Here's how:

In PHP to delete the function is more specific than JS, in addition to the trim () function, there are LTrim () and RTrim () function, they have to delete the left and right space, in addition to these three functions can also use regular delete.

LTrim () function: LTrim ($STR, $charlist)

$STR represents the string being processed, $charlist is the special character to be removed, and if empty, the left-hand space is removed and the code is as follows:
Copy the Code code as follows: <?php
$t = "... I ' m Jacky ... ";
echo "a". $t. "
";
$left =ltrim ($t);
echo "a". $left. "
";
$lleft =ltrim ($left, ".");
Echo $lleft;
?>

RTrim () function: RTrim ($STR, $charlist)

$STR represents the string being processed, $charlist is the special character to be removed, and if empty, the right-hand space is removed, and the code is as follows:
Copy the Code code as follows: <?php
$a = "htm";
echo $a. " L "."
";
echo RTrim ($a). " L ";
?>

trim () function, first to turn the trailing space, the code is as follows:
Copy the code as follows: $str = "This line containstliberal RN use of whitespace.nn";
First, turn the trailing blanks.
$str = Trim ($STR);
Then remove more than two spaces above the
$str = Preg_replace ('/s (? =s)/', ' ', $str);
Finally, replace the non-whitespace with a space
$str = preg_replace ('/[nrt]/', ' ', $str);
Using the above example, you can remove all the extra spaces, first use trim () to go to the leading and trailing blanks, and then use Preg_replace () to remove the repeated spaces.

by replacing the regular expression , the function is stronger, PHP removes the string from the end of the line (including the full width), the code is as follows:
Copy the Code code as follows: <?php
$STR = "Help the house www.jb51.net";
$str = Mb_ereg_replace (' ^ (|) + ', ', $str);
$str = Mb_ereg_replace (' (|) +$ ', ', $str);
Echo mb_ereg_replace (', ' n ', $str);
?>

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/919627.html www.bkjia.com true http://www.bkjia.com/PHPjc/919627.html techarticle PHP Delete the left and right side of the space method, PHP remove blank space In this example, this article describes the method of removing the empty and right end of PHP. Share to everyone for your reference. The specific method is as follows: ...

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