1. 使用print_r函数打印数组: print_r函数是PHP内置的用于打印数组的函数,可以将数组的结构和内容以易读的方式输出到浏览器。使用方法如下: “`php $array = array(‘a’, ‘b’, ‘c’); print_r($array); “` 以上代码将打印出类似如下的结果: “` Array ( [0] => a [1] => b [2] => c...
print_r($values); // 输出:Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) “` 可以使用array_keys函数获取关联数组中的所有键,例如: “` $arr = [‘key1’ => ‘value1’, ‘key2’ => ‘value2’]; $keys = array_keys($arr); print_r($keys); // 输出...
{$headers=array('Authorization: Basic ' .base64_encode("$user:$pw")); curl_setopt($ch, CURLOPT_HTTPHEADER,$headers); }$ok= curl_exec($ch); curl_close($ch);$head=ob_get_contents
$out = array(); foreach($m[1] as $key => $value){ $type = explode('::',$value); if(sizeof($type)>1){ if(!is_array($out[$type[0]])) $out[$type[0]] = array(); $out[$type[0]][] = $type[1]; } else { $out[] = $value; } } return $out; } print_r(g(...
PHP print_r() Example <?php $colors = array("black", "white", "grey"); print_r($colors); ?> #output: Array #( # [0] => black # [1] => white # [2] => grey #) PHP Print Array Examples The following are examples of printing an array in PHP: Displaying information about...
We will introduce a way to write an array to a file in PHP using the print_r() and the file_put_contents() functions. This method writes the specified array to the specified file in the system.We will also introduce a way to print an array to a PHP file using the print_r() ...
Well, that does it for this article! I have also put together a demo pack containing all of the files and code for this tutorial. To use the demo, download the following zip file and upload its unzipped contents to any PHP-enabled server (i.e., PHP required). ...
答:echo是语言结构,无返回值;print功能和echo基本相同,不同的是print是函数,有返回值;print_r是递归打印,用于输出数组对象 14.如何实现字符串翻转? 答:.用strrev函数呗,不准用PHP内置的就自己写: strrev($str) { $len=strlen($str); $newstr = ''; ...
phpclassWeakMap2{privatearray$weakRefs= [];privatearray$values= [];publicfunctionoffsetSet($object,$value) :void{$id=spl_object_id($object);$this->weakRefs[$id] = \WeakReference::create($object);$this->values[$id] =$value; } }classWeakAnalysingMapRepro{/* private */publicarray$value...