api接口对接如何实现，php如何对接api

这篇文章来分享下api接口对接如何实现还有源码希望对新手有所帮助。

什么是API?

我的回答API 应用程序编程接口一般来说这是一套明确定义的各种软件组件之间的通信方法。

什么是API我们不妨用一个小故事展示出来

研发人员A开发了软件A研发人员B正在研发软件B。

有一天研发人员B想要调用软件A的部分功能来用但是他又不想从头看一遍软件A的源码和功能实现过程怎么办呢

研发人员A想了一个好主意我把软件A里你需要的功能打包好写成一个函数你按照我说的流程把这个函数放在软件B里就能直接用我的功能了

其中API就是研发人员A说的那个函数。

进一步解释:

比如c语言的fopen函数来打开一个文件感觉非常简单。

但是操作到底层是非常复杂的打开文件需要扫描硬盘找到我文件位置然后读取部分数据并放进i/o缓存中放进内存。

这些数据都是01序列还要对照ASCII表或者unicode表翻译成字符再在显示器上显示出来。如果这个过程让程序员来完成简直就是个噩梦。不可能的事。

怎么办呢

操作系统就想了一个很好的办法。它预先把复杂的操作写在一个函数里面编译成一个组件一般是动态链接库程序员只需要简单的调用这些函数就可以用完成复杂的工作。

这些封装好的函数就叫做API。

<?php


set_time_limit(270);
error_reporting(E_ERROR | E_WARNING | E_PARSE);

define('TITLE_SEPAR', 'xxx**xxx');
define('TITLE_SEPAR2', '262661');


$url = 'http://api-9.xiaofamao.com/api.php?json=0&v=1&key=tttttt';

$content_tag_name = '内容';

$headdd = '';
$taill = '';

switch($LabelArray['PageType'])
{
    case 'Save'://只有保存时是可以处理标签值的
        // 保存原文

    try {
    $title = $LabelArray['标题'];
    $title = '标题'.$title;

    $content = $LabelArray[$content_tag_name];
    #$content = str_replace('2020/', '2020_', $content);

    $article_src = compose_article($title, $content);
    $article_src_b = $article_src;

    $article_new = get_wyc_article($article_src);


    $title_wyc = trim($article_new[0]);
    $content_wyc = trim($article_new[1]);

    $content_wyc = fix_newline($content_wyc);
    $content_wyc = str_replace('标签', '标签:', $content_wyc);
    $LabelArray[$content_tag_name] = $headdd. $content_wyc. $taill;

    $title_wyc = str_replace(array('。','','％'), array(' ',' ',' '), $title_wyc);
    $LabelArray['标题'] = $title_wyc;
    }
    catch (Exception $e) {
        $LabelArray['标题'] .= $e->getMessage();
        $LabelArray[$content_tag_name] .= $e->getMessage();
    }
        break;
    default:
}

echo serialize($LabelArray);



function compose_article($title, $content) {
    $separator = compose_separator();
    return $title.$separator.$content;
}

function compose_separator() {
    return PHP_EOL.'('.TITLE_SEPAR2.')'.PHP_EOL;
}


function fix_separator($article) {
    return $article;
}


function get_wyc_article($str) {
    global $url;
    $separator = compose_separator();
    $separator = str_replace(PHP_EOL, '', $separator);
    $wyc = curl_request($url, array('wenzhang'=>$str));

    $wyc_f = $wyc;
    $wyc = fix_separator($wyc);
    $wyc = explode($separator, $wyc);

    if (isset($wyc[0])){
        $wyc[0] = str_replace('标题', '', $wyc[0]);
        $wyc[0] = str_replace('标题:', '', $wyc[0]);
        $wyc[0] = str_replace('目', '', $wyc[0]);
        $wyc[0] = str_replace('目:', '', $wyc[0]);
        $wyc[0] = 'xx`xx'.$wyc[0];
        $wyc[0] = str_replace('xx`xx题', '', $wyc[0]);
        $wyc[0] = str_replace('xx`xx', '', $wyc[0]);
    }

    return $wyc;
}


function get_wyc_title($str) {
    $title = get_wyc_article($str.PHP_EOL.PHP_EOL.PHP_EOL.$str.PHP_EOL.PHP_EOL.PHP_EOL.$str);
    $title = fix_newline($title);
    $title = explode(PHP_EOL, $title);
    return $title[0];
}

function get_keywords($title, $contents) {
    $url_kw = 'http://api-2.78tp.com/nlp/kws.php?appid=';
    $kws = curl_request($url_kw, array(
    'title'=>$title,
    'len'=>100,
    'text'=>$contents));

    return $kws;
}


function remove_alt($contents) {
    $contents = preg_replace('/alt=\"(.*)\"/', '', $contents);
    return $contents;
}


function fix_title($contents) {
    $punctuation_symbol = array('。', '', '', '', '', '、', '',
                                '.',  '?',  ',',  ':',  ';', '!');

     $contents = str_replace($punctuation_symbol, '', $contents);
    return $contents;
}

function br2newline($contents) {
    $contents = str_replace('<br>', PHP_EOL, $contents);
    $contents = str_replace('<br/>', PHP_EOL, $contents);
    $contents = str_replace('<br />', PHP_EOL, $contents);
    $contents = str_replace('<BR/>', PHP_EOL, $contents);
    $contents = str_replace('<BR>', PHP_EOL, $contents);
    $contents = str_replace('<BR />', PHP_EOL, $contents);

    return $contents;
}

function newline2br($contnets) {
    $contnets = str_replace(PHP_EOL, "<br>", $contnets);
    $contnets = str_replace('<p><br>', '<p>', $contnets);
    return $contnets;
}


function delete_newline($contents) {
    $contents = fix_newline($contents);
    return $contents;
}

function reset_newline_win($contents) {
    // 优化换行符
    $contents = str_replace("\r\n", "\n", $contents);
    $contents = str_replace("\r", "\n", $contents);
    $contents = str_replace("\n", PHP_EOL, $contents);

    return $contents;
}

function fix_newline($data) {
    $data = str_replace("\r", "\n", $data);
    while(strpos($data, "\n\n") !== false) {
        $data = str_replace("\n\n", "\n", $data);
    }
    $data = str_replace("\n", PHP_EOL, $data);

    return $data;
}

function clean_contents($contents) {
    $sa = new cleanHtml;  
    $sa->allow = array( 'src' );    
    $sa->exceptions = array(  
    'img' => array( 'src', 'alt' ),  
    //'a' => array( 'href', 'title' ),  
    'iframe'=>array('src','frameborder'),  
    ); 
    $str = $sa->strip( $contents );   

    return $str;
}


function xfm_strong_str_replace_once($search, $replace, $subject) {
    $firstChar = strpos($subject, $search);
    if($firstChar !== false) {
        $beforeStr = substr($subject,0,$firstChar);
        $afterStr = substr($subject, $firstChar + strlen($search));
        return $beforeStr.$replace.$afterStr;
    } else {
        return $subject;
    }
}

//参数1访问的URL参数2post数据(不填则为GET)参数3提交的$cookies,参数4是否返回$cookies
function curl_request($url,$post='',$cookie='', $returnCookie=0){
    if (! extension_loaded('curl')) {
        file_exists('./ext/php_curl.dll') && dl('php_curl.dll'); // 加载扩展
    }
    
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)');
    if (ini_get('open_basedir') == '' && strtolower(ini_get('safe_mode')) != 'on'){ 
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    }
        curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
        curl_setopt($curl, CURLOPT_REFERER, "http://XXX");
        if($post) {
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($post));
        }
        if($cookie) {
            curl_setopt($curl, CURLOPT_COOKIE, $cookie);
        }
        curl_setopt($curl, CURLOPT_HEADER, $returnCookie);
        curl_setopt($curl, CURLOPT_TIMEOUT, 150);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);
        if (curl_errno($curl)) {
            return curl_error($curl);
        }
        curl_close($curl);
        if($returnCookie){
            list($header, $body) = explode("\r\n\r\n", $data, 2);
            preg_match_all("/Set\-Cookie:([^;]*);/", $header, $matches);
            $info['cookie']  = substr($matches[1][0], 1);
            $info['content'] = $body;
            return $info;
        }else{
            return $data;
        }
}

//echo $tag;
// 计算中文字符串长度
function utf8_strlen($string = null) {
// 将字符串分解为单元
preg_match_all("/./us", $string, $match);
// 返回单元个数
return count($match[0]);
}


function reg_escape( $str )  
{  
    $conversions = array( "^" => "\^", "[" => "\[", "." => "\.", "$" => "\$", "{" => "\{", "*" => "\*", "(" => "\(", "\\" => "\\\\", "/" => "\/", "+" => "\+", ")" => "\)", "|" => "\|", "?" => "\?", "<" => "\<", ">" => "\>" );  
    return strtr( $str, $conversions );  
}  
  
/** 
* Strip attribute Class 
* Remove attributes from XML elements 
* @author David (semlabs.co.uk) 
* @version 0.2.1 
*/  
  
class cleanHtml{  
      
    public $str         = '';  
    public $allow       = array();  
    public $exceptions  = array();  
    public $ignore      = array();  
      
    public function strip( $str )  
    {  
        $this->str = $str;  
          
        if( is_string( $str ) && strlen( $str ) > 0 )  
        {  
            $res = $this->findElements();  
            if( is_string( $res ) )  
                return $res;  
            $nodes = $this->findAttributes( $res );  
            $this->removeAttributes( $nodes );  
        }  
          
        return $this->str;  
    }  
      
    private function findElements()  
    {  
        # Create an array of elements with attributes  
        $nodes = array();  
        preg_match_all( "/<([^ !\/\>\n]+)([^>]*)>/i", $this->str, $elements );  
        foreach( $elements[1] as $el_key => $element )  
        {  
            if( $elements[2][$el_key] )  
            {  
                $literal = $elements[0][$el_key];  
                $element_name = $elements[1][$el_key];  
                $attributes = $elements[2][$el_key];  
                if( is_array( $this->ignore ) && !in_array( $element_name, $this->ignore ) )  
                    $nodes[] = array( 'literal' => $literal, 'name' => $element_name, 'attributes' => $attributes );  
            }  
        }  
          
        # Return the XML if there were no attributes to remove  
        if( !$nodes[0] )  
            return $this->str;  
        else  
            return $nodes;  
    }  
      
    private function findAttributes( $nodes )  
    {  
          
        # Extract attributes  
        foreach( $nodes as &$node )  
        {  
            preg_match_all( "/([^ =]+)\s*=\s*[\"|']{0,1}([^\"']*)[\"|']{0,1}/i", $node['attributes'], $attributes );  
            if( $attributes[1] )  
            {  
                foreach( $attributes[1] as $att_key => $att )  
                {  
                    $literal = $attributes[0][$att_key];  
                    $attribute_name = $attributes[1][$att_key];  
                    $value = $attributes[2][$att_key];  
                    $atts[] = array( 'literal' => $literal, 'name' => $attribute_name, 'value' => $value );  
                }  
            }  
            else  
                $node['attributes'] = null;  
              
            $node['attributes'] = $atts;  
            unset( $atts );  
        }  
          
        return $nodes;  
    }  
      
    private function removeAttributes( $nodes )  
    {  
          
        # Remove unwanted attributes  
        foreach( $nodes as $node )  
        {  
              
            # Check if node has any attributes to be kept  
            $node_name = $node['name'];  
            $new_attributes = '';  
            if( is_array( $node['attributes'] ) )  
            {  
                foreach( $node['attributes'] as $attribute )  
                {  
                    if( ( is_array( $this->allow ) && in_array( $attribute['name'], $this->allow ) ) || $this->isException( $node_name, $attribute['name'], $this->exceptions ) )  
                        $new_attributes = $this->createAttributes( $new_attributes, $attribute['name'], $attribute['value'] );  
                }  
            }  
            $replacement = ( $new_attributes ) ? "<$node_name $new_attributes>" : "<$node_name>";  
            $this->str = preg_replace( '/'. reg_escape( $node['literal'] ) .'/', $replacement, $this->str );  
        }  
          
    }  
      
    private function isException( $element_name, $attribute_name, $exceptions )  
    {  
        if( array_key_exists($element_name, $this->exceptions) )  
        {  
            if( in_array( $attribute_name, $this->exceptions[$element_name] ) )  
                return true;  
        }  
          
        return false;  
    }  
      
    private function createAttributes( $new_attributes, $name, $value )  
    {  
        if( $new_attributes )  
            $new_attributes .= " ";  
        $new_attributes .= "$name=\"$value\"";  
          
        return $new_attributes;  
    }  
  
}  

?>

参考如何对接伪原创API 更加通俗讲:别人写好的代码或者编译好的程序提供给你使用就叫做api。

因为你使用了别人的代码 或者程序中的某个函数类对象就叫做使用了某个api。