php去除字符串中空字符和空格、全角空格、换行等的常用方法整理

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 = " www.qipa250.com ";
$leftTrimmed = ltrim($text);
$rightTrimmed = rtrim($text);
$bothTrimmed = trim($text);
print("leftTrimmed = ($leftTrimmed)");
echo "
";
print("rightTrimmed = ($rightTrimmed)");
echo "
";
print("bothTrimmed = ($bothTrimmed)");
echo "
";
?>

输出结果

过滤 空格、全角空格、换行

function myTrim($str)
{
    $search = array(" ","　","\n","\r","\t");
    $replace = array("","","","","");
    return str_replace($search, $replace, $str);
}

echo '当前字符串内容：'.$str = 'www.qipa250.com
QIPA250 奇葩天地网 qipa250.com';

echo "
";
echo '过滤后的字符串内容：'.myTrim($str);

echo "
";

结果如下：