What's better to use in PHP $array[] = $value or array

What's better to use in PHP for appending an array member $array[] = $value or array_push($array, $value) ? Though the manual says you're better off to avoid a function call, I've also read $array[] is much slower than array_push() . Does anyone have any clarifications or benchmarks? No benchmarks, but I personally feel like $array[] is cleaner to look at, and honestly splitting

在PHP $ array [] = $ value或array中使用哪个更好

在PHP中使用附加数组成员$array[] = $value或array_push($array, $value)更好吗? 虽然手册说你最好避免函数调用,但我也读过$array[]比array_push()慢得多。 有没有人有任何澄清或基准? 没有基准测试,但我个人觉得$array[]看起来更干净,老实说,在几毫秒内拆分头发是非常不相关的,除非你打算在数组中添加数十万个字符串。 编辑 :冉这个代码: $t = microtime(true); $array = array(); for($i = 0; $i < 10000;

What is the meaning of []

I have a code as below and I am not sure what type of data variable $ACTIVITYGROUPS[] has and how do I read it ? $ACTIVITYGROUPS[] = saprfc_table_read ($fce, "ACTIVITYGROUPS", $i); When I did print_r(saprfc_table_read ($fce, "ACTIVITYGROUPS", $i); I got bunch of arrays without any seperator and not sure how to exactract the data. can someone tell me what does it do in above sentences

是什么意思 []

我有一个代码如下,我不知道什么类型的数据变量$ACTIVITYGROUPS[]有,我怎么读它? $ACTIVITYGROUPS[] = saprfc_table_read ($fce, "ACTIVITYGROUPS", $i); 当我做了print_r(saprfc_table_read ($fce, "ACTIVITYGROUPS", $i);我得到了一堆数组,没有任何分隔符,也不知道如何精确数据。有人能告诉我它在上面的句子中做了什么? 这里是print_r(saprfc_table_read ($fce, "ACTIVITYGROUPS", $i);结果给我

What does <?= mean?

whats the meaning of this line <input type=text name="name" value="<?= $name ?> if we are to declare as PHP shouldn't we write <?php instead of <?= Thanks <?= are PHP short open tags, which can be enabled (or disabled) via the short_open_tag directive in php.ini (quoting) : This directive also affects the shorthand <?= , which is identical to <? echo <? ech

<?=是什么意思?

这条线的含义是什么 <input type=text name="name" value="<?= $name ?> 如果我们要声明PHP不应该写<?php instead of <?= 谢谢 <?=是PHP短打开标记,可以通过php.ini (quoting)中的short_open_tag指令启用(或禁用): 该指令也影响速记<?= ,这与<? echo相同<? echo <? echo 。 使用这个快捷方式需要on short_open_tag 。 和: 另外,如果禁用,您必须使用PHP开放标签( <?ph

What does '<?=' mean in PHP?

<?php $a=1; ?> <?=$a;?> <?=意味着什么? It's a shorthand for <?php echo $a; ?> <?php echo $a; ?> . It's enabled by default since 5.4 regardless of php.ini settings. It's a shorthand for this: <?php echo $a; ?> They're called short tags; see example #2 in the documentation. Since it wouldn't add any value to repeat that it means ech

在PHP中'<= ='是什么意思?

<?php $a=1; ?> <?=$a;?> <?=意味着什么? 它是<?php echo $a; ?>的简写形式<?php echo $a; ?> <?php echo $a; ?> 。 无论使用什么php.ini设置,它都是默认启用的。 这是一个简写: <?php echo $a; ?> 他们被称为短标签; 请参阅文档中的示例#2。 既然它不会增加任何价值来重复它,它意味着echo ,我想你想看看PHP中究竟有什么含义: Array ( [0] => Array

What does this symbol mean in PHP <?=

What does this symbol mean in PHP <?= ? Example usage: <h2>Manage Role: > (<?= $myACL->getRoleNameFromID($_GET['roleID']); ?>)</h2> It's functionally the same as <?php echo $myACL->getRoleNameFromID($_GET['roleID']); ?> <?php echo $myACL->getRoleNameFromID($_GET['roleID']); ?> To add to Mark's answer: The short_tags optio

这个符号在PHP中的含义<?=

这个符号在PHP中意味着什么<?= ? 用法示例: <h2>Manage Role: > (<?= $myACL->getRoleNameFromID($_GET['roleID']); ?>)</h2> 它的功能与<?php echo $myACL->getRoleNameFromID($_GET['roleID']); ?> <?php echo $myACL->getRoleNameFromID($_GET['roleID']); ?> 要添加到Mark的答案:必须启用short_tags选项以使<?=语法有效。 当移动到禁用此选项的

What are the backticks `` called?

在评估其内容的过程中调用了哪些反引号操作符(``)? If you're referring to bash then the backticks are known as "command substitution". $() provides similar functionality. Backticks (``) is an Execution Operator. PHP will attempt to execute the contents of the backticks as a shell command; the output will be returned (ie, it won't simply be dumped to output; it can be assign

“叫什么反引号?

在评估其内容的过程中调用了哪些反引号操作符(``)? 如果你指的是bash,那么反引号被称为“命令替换”。 $()提供了类似的功能。 反引号(``)是一个执行操作符。 PHP将尝试执行反引号的内容作为shell命令; 输出将被返回(即,它不会被简单地转储到输出;它可以被分配给一个变量)。 使用反引号操作符与shell_exec()完全相同。 例如。 <?php $output = `ls -la`; echo "<pre>$output</pre>"; ?> 欲了

$function() and $$variable

What the heck is $function(); and $$variable for? Have never heard of these before, and searching on google doesn't give anything useful (possible that my keywords aren't perfect). via https://stackoverflow.com/questions/4891301/top-bad-practices-in-php/4891422#4891422 $function() is a variable function and $$variable is a variable variable. Those linked pages should give you ple

$ function()和$$变量

什么是$function(); 和$$variable为? 从来没有听说过这些,而在谷歌搜索没有给任何有用的东西(可能我的关键字不完美)。 通过https://stackoverflow.com/questions/4891301/top-bad-practices-in-php/4891422#4891422 $function()是一个变量函数, $$variable是一个变量变量。 这些链接的页面应该给你足够多的东西,或者至少是一些真正的单词来进行搜索。 $$variable可能非常有用。 它能做什么: $a = 1; $b = "a"

what is "$$" in PHP

I saw this code if (is_null($$textVarName)) { $$textVarName = $_defaultTexts[$type]; } what is code "$$" ? It's evil is what it is. That will take the value that's in $textVarName and use that as a variable name. For example: $foo = 'hello'; $hello = 'The Output'; echo $$foo; // displays "The Output" foreach($_POST as $key=>$value)$$key=$value; now, automagically, if

什么是PHP中的“$$”

我看到了这个代码 if (is_null($$textVarName)) { $$textVarName = $_defaultTexts[$type]; } 什么是代码“$$”? 它是邪恶的。 这将采用$textVarName的值并将其用作变量名称。 例如: $foo = 'hello'; $hello = 'The Output'; echo $$foo; // displays "The Output" foreach($_POST as $key=>$value)$$key=$value; 现在,自动地,如果以前的表单有一个名为'用户名'的字段,你现在有一个名为$ username的变量

What does $$ (dollar dollar or double dollar) mean in PHP?

Example is a variable declaration within a function: global $$link; What does $$ mean? A syntax such as $$variable is called Variable Variable . For example, if you consider this portion of code : $real_variable = 'test'; $name = 'real_variable'; echo $$name; You will get the following output : test Here : $real_variable contains test $name contains the name of your variable : '

PHP(美元美元或双倍美元)在PHP中意味着什么?

例子是一个函数内的变量声明: global $$link; $$是什么意思? 诸如$$variable语法称为变量变量 。 例如,如果您考虑这部分代码: $real_variable = 'test'; $name = 'real_variable'; echo $$name; 您将得到以下输出: test 这里 : $real_variable包含测试 $name包含变量的名称: 'real_variable' $$name意思是“变量thas的名称包含在$name ” 这是$real_variable 并有值'test' @ Jhonny

What do commas mean in a variable declaration?

I've found this in includes/parser/Parser.php of MediaWiki PHP source: public function replaceInternalLinks2( &$s ) { global $wgExtraInterlanguageLinkPrefixes; static $tc = false, $e1, $e1_img; //... } What is this comma delimited list? What value $tc receives? It's the same as: static $tc = false; static $e1; static $e1_img; So $tc received false .

逗号在变量声明中的含义是什么?

我在MediaWiki PHP source的includes/parser/Parser.php中找到了这个: public function replaceInternalLinks2( &$s ) { global $wgExtraInterlanguageLinkPrefixes; static $tc = false, $e1, $e1_img; //... } 这个逗号分隔的列表是什么? $tc收到什么价值? 这与以下内容相同: static $tc = false; static $e1; static $e1_img; 所以$tc收到了false 。