<?php $a =array("red","green","blue"); print_r($a); echo"<br>"; $b =array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); print_r($b); ?> Try it Yourself » Definition and Usage The print_r() function prints the info
The moment I saw the print_r() function of PHP, I fell in love with it. It is a very necessary function and I cannot understand why no other language supports it. JavaScript is one such language. So, I have ported the print_r function to javascript. /** * Function : dump() * A...
PHP print_r的函数很好用,可以用来打印数组、对象等的结构与数据,可惜JavaScript并没有原生提供类似的函数。不过我们可以试着自己来实现这个函数,下面提供一些方法与思路。 方法一 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 functionprint_r(theObj) { varretStr =''; if(typeoftheObj =='object')...
array_filter(*array*,*callbackfunction*);array_intersect_uassoc(*array1*,*array2*,*array3*...,*myfunction*)array_intersect_ukey(*array1*,*array2*,*array3*...,*myfunction*)array_reduce(*array*,*myfunction*,*initial*)array_walk(*array*,*myfunction*,*userdata*...)……...
Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers When using: function my_cb($b) { $r = print_r($b, true); return $b . $r; } it works without error (now, this wasn't the case in earlier PHP versions where it had the same issue as ...
1. 方法概述 首先,写一个最简单的函数,大家看一眼就可以了: HelloPHP <?php function CustomPrint($str) { for($i=0;$i<5>’); } } CustomPrint(“Hello”); ?> 通过这个例子,相信大家都了解了PHP中函数的大致写法,至于 上传者:weixin_38738783时间:2020-12-18 PHP session_start()问题...
To print in text mode you can use the rt() function instead: rt($var); To terminate the script after the info is dumped, prepend the bitwise NOT operator: ~r($var); // html ~rt($var); // text Prepending the error control operator (@) will return the information: $output = ...
⽤js写了⼀个类似php的print_r输出换⾏功能复制代码代码如下: <!-- var my={ str:'',deep:0,block:' ',get_pre:function(n){ pre='';for(i=0;i<n;i++){ pre+=this.block;} return pre;},show_obj:function(obj){ for(k in obj){ if(typeof(obj[k])!='object' && typeof(obj...
The sprintf() function of C Programming can also be used in R. It is used to print formatted strings. For example, myString <- "Welcome to Programiz" # print formatted string sprintf("String: %s", myString) Output [1] "String: Welcome to Programiz" Here, String: %s - a formatt...
function cube($n){ return ($n * $n * $n); } $a = [1, 2, 3, 4, 5]; $b = array_map('cube', $a); print_r($b); 在PHP 7.4 发布后,你就可以按如下的方法写: $a = [1, 2, 3, 4, 5]; $b = array_map(fn($n) => $n * $n * $n, $a); ...