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10 个 PHP 关于字符串处理的代码片段

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2016-05-25 17:12:541204browse

代码片段(11) [全屏查看所有代码]

                       

                       

1. [代码]移除 HTML 标签  

           

$text = strip_tags($input, "");

                   

                       

                       

2. [代码]返回 $start 和 $end 之间的文本    

           

function GetBetween($content,$start,$end){
    $r = explode($start, $content);
    if (isset($r[1])){
        $r = explode($end, $r[1]);
        return $r[0];
    }
    return '';
}

                   

                       

                       

3. [代码]将url转换成链接    

           

$url = "Jean-Baptiste Jung (http://www.php.cn/)";
$url = preg_replace("#http://([A-z0-9./-]+)#", &#39;<a href="http://www.catswhocode.com/blog/$1" style="font-size: 12px; vertical-align: baseline; background-color: transparent; margin: 0px; padding: 0px; color: #3777af; text-decoration: none; font-weight: bold">$0</a>&#39;, $url);

                   

                       

                       

4. [代码]切分字符串为140个字符    

function split_to_chunks($to,$text){
	$total_length = (140 - strlen($to));
	$text_arr = explode(" ",$text);
	$i=0;
	$message[0]="";
	foreach ($text_arr as $word){
		if ( strlen($message[$i] . $word . &#39; &#39;) <= $total_length ){
			if ($text_arr[count($text_arr)-1] == $word){
				$message[$i] .= $word;
			} else {
				$message[$i] .= $word . &#39; &#39;;
			}
		} else {
			$i++;
			if ($text_arr[count($text_arr)-1] == $word){
				$message[$i] = $word;
			} else {
				$message[$i] = $word . &#39; &#39;;
			}
		}
	}
	return $message;
}

                   

                       

                       

5. [代码]删除字符串中的URL    

           

$string = preg_replace(&#39;/\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|$!:,.;]*[A-Z0-9+&@#\/%=~_|$]/i&#39;, &#39;&#39;, $string);

                   

                       

                       

6. [代码]将字符串转成SEO友好的字符串    

           

function slug($str){
	$str = strtolower(trim($str));
	$str = preg_replace(&#39;/[^a-z0-9-]/&#39;, &#39;-&#39;, $str);
	$str = preg_replace(&#39;/-+/&#39;, "-", $str);
	return $str;
}

                   

                       

                       

7. [代码]解析 CSV 文件   

           

$fh = fopen("contacts.csv", "r");
while($line = fgetcsv($fh, 1000, ",")) {
    echo "Contact: {$line[1]}";
}

                   

                       

                       

8. [代码]字符串搜索    

function contains($str, $content, $ignorecase=true){
    if ($ignorecase){
        $str = strtolower($str);
        $content = strtolower($content);
    }
    return strpos($content,$str) ? true : false;
}

                   

                       

                       

9. [代码]检查字符串是否以某个串开始  

function String_Begins_With($needle, $haystack {
    return (substr($haystack, 0, strlen($needle))==$needle);
}

                   

                       

                       

10. [代码]从字符串中提取email地址    

           

function extract_emails($str){
    // This regular expression extracts all emails from a string:
    $regexp = &#39;/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i&#39;;
    preg_match_all($regexp, $str, $m);

    return isset($m[0]) ? $m[0] : array();
}

$test_string = &#39;This is a test string...

        test1@example.org

        Test different formats:
        test2@example.org;
        <a href="test3@example.org">foobar</a>
        <test4@example.org>

        strange formats:
        test5@example.org
        test6[at]example.org
        test7@example.net.org.com
        test8@ example.org
        test9@!foo!.org

        foobar
&#39;;

print_r(extract_emails($test_string));

                   

                       

                       

11. [代码][PHP]代码    

function extract_emails($str){
    // This regular expression extracts all emails from a string:
    $regexp = &#39;/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i&#39;;
    preg_match_all($regexp, $str, $m);

    return isset($m[0]) ? $m[0] : array();
}

$test_string = &#39;This is a test string...

        test1@example.org

        Test different formats:
        test2@example.org;
        <a href="test3@example.org">foobar</a>
        <test4@example.org>

        strange formats:
        test5@example.org
        test6[at]example.org
        test7@example.net.org.com
        test8@ example.org
        test9@!foo!.org

        foobar
&#39;;

print_r(extract_emails($test_string));

                   

                   

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