php Curl循环从目录下载图像

Question

I wanted to download images from an api, it returns a type of '.jpg' when you access the url like this.

https://www.foo.com/getimage.php?id=??

I found out that the script accepts an encoded id , but with base64_encode only, so I try doing it this way.

<?php
$ch = curl_init();
for($i = 1; $i <= 10; $i++) {
 $ch = curl_init();
 $id = base64_encode($i);
 curl_setopt($ch,CURLOPT_URL,"https://www.foo.com/getimage.php?id=$id");
 if(curl_exec($ch)===false){
   file_put_contents('downloads/' . base64_decode($id) . '.jpg', $ch);
 }
}
curl_close($ch);

What do you think is my mistake.

Answer 1

This will work with HTTP connection. You will need some additional settings to work with HTTPS .

Some important notes are commented in the code.

<?php

for($i = 1; $i <= 10; $i++) {
    $ch = curl_init();
    $id = base64_encode($i);
    curl_setopt($ch,CURLOPT_URL,"https://www.foo.com/getimage.php?id=$id");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // return data as string

    // disable peer verification
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

    // disable host verification
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); 

    // spoof a real browser client string
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)"); 
    $output = curl_exec($ch); // capture data into $output variable

    if( $output != false){
        file_put_contents('downloads/' . base64_decode($id) . '.jpg', $output );
    }
    curl_close($ch);
}

CURLOPT_RETURNTRANSFER

TRUE to return the transfer as a string of the return value of curl_exec() instead of outputting it out directly.

CURLOPT_SSL_VERIFYPEER

FALSE to stop cURL from verifying the peer's certificate. Alternate certificates to verify against can be specified with the CURLOPT_CAINFO option or a certificate directory can be specified with the CURLOPT_CAPATH option.

CURLOPT_SSL_VERIFYPEER

FALSE to stop cURL from verifying the certificate was issued to the entity we are connected to.

http://www.php.net/curl_setopt