在下面的场景中使用substr的时候,有时候会报超出内存fatal error,当curl读取的内容过大的时候
$header_size = curl_getinfo($curl_handle,CURLINFO_HEADER_SIZE);
$this->response_headers = substr($this->response,$header_size);
$this->response_body = substr($this->response,$header_size);
$this->response_code = curl_getinfo($curl_handle,CURLINFO_HTTP_CODE);
$this->response_info = curl_getinfo($curl_handle);
用substr切分curl返回的内容,分出header头和body体
1. 测试一下:
<?PHP $start=memory_get_usage(); $str="123"; var_dump(memory_get_usage()-$start); //$a=substr($str,1); $a=$str; var_dump(memory_get_usage()-$start-24); $b=$str; //$b=mb_substr($str,1); var_dump(memory_get_usage()-$start-24); $c=$str; //$b=mb_substr($str,1); var_dump(memory_get_usage()-$start-24);
这个变量赋值,占48字节
2.使用substr切分后
<?PHP $start=memory_get_usage(); $str="123"; var_dump(memory_get_usage()-$start); //$a=substr($str,1); $a=$str; var_dump(memory_get_usage()-$start-24); //$b=$str; $b=substr($str,1); var_dump(memory_get_usage()-$start-24); //$c=$str; $c=substr($str,1); var_dump(memory_get_usage()-$start-24);
切分后赋值,占到了92字节 和 96字节,比原变量涨了一倍多
