php中四个去除字符串中空字符的函数

php中包含四个可以去除字符串空格的函数：
trim() – 去除字符串两端的空字符
ltrim() – 去除字符串前端的空字符
rtrim() – 去除字符串末尾的空字符
chop() –同rtrim().

<?php
$text = "\t \t 75271.com!\t \t ";
$leftTrimmed = ltrim($text);
$rightTrimmed = rtrim($text);
$bothTrimmed = trim($text);
print("leftTrimmed = ($leftTrimmed)\n");
print("rightTrimmed = ($rightTrimmed)\n");
print("bothTrimmed = ($bothTrimmed)\n");
?>

输出结果

leftTrimmed = (75271.com! )
rightTrimmed = ( 75271.com!)
bothTrimmed = (75271.com!)