如何在 PHP 中使用 var_dump() 查看长字符串的完整内容

Question

我有一个包含一些字符串的数组，例如

$array = array("string1","string2","string3");

但是那些字符串很长，有时长度超过2000。所以当我做

echo "<pre>";
var_dump($array);
echo "</pre>";

它向我展示了类似

的内容

string 'zzzzzzzzzzzzzzzzz '... (length = 994)
string 'yyyyyyyyyyyyyyyyy '... (length = 1287)
string 'xxxxxxxxxxxxxxxxx '... (length = 1718)

而不是完整的字符串。我怎样才能看到数组的全部内容？对于那些会问的人，它包含 HTML 标签，所以这就是为什么我不写 echo $array[string];

Answer 1

这样的东西也会在值中显示任何 html 标签：

foreach($array as $key=>$value) {
    echo($key.':<br /><pre>'.htmlspecialchars($value).'<pre><hr>');
}

Answer 2

您正在使用 xdebug，它会重载默认 var_dump() 以提供更漂亮和更可配置的输出。默认情况下，它还会限制一次显示多少信息。要获得更多输出，您应该更改一些设置。

将此添加到脚本的顶部：

ini_set("xdebug.var_display_max_children", '-1');
ini_set("xdebug.var_display_max_data", '-1');
ini_set("xdebug.var_display_max_depth", '-1');

来自the docs：

xdebug.var_display_max_children

Type: integer, Default value: 128

Controls the amount of array children and object's properties are shown when variables are displayed with either xdebug_var_dump(), xdebug.show_local_vars or through Function Traces.

To disable any limitation, use -1 as value.

This setting does not have any influence on the number of children that is send to the client through the Remote Debugging feature.

xdebug.var_display_max_data

Type: integer, Default value: 512

Controls the maximum string length that is shown when variables are displayed with either xdebug_var_dump(), xdebug.show_local_vars or through Function Traces.

To disable any limitation, use -1 as value.

This setting does not have any influence on the number of children that is send to the client through the Remote Debugging feature.

xdebug.var_display_max_depth

Type: integer, Default value: 3

Controls how many nested levels of array elements and object properties are when variables are displayed with either xdebug_var_dump(), xdebug.show_local_vars or through Function Traces.

The maximum value you can select is 1023. You can also use -1 as value to select this maximum number.

This setting does not have any influence on the number of children that is send to the client through the Remote Debugging feature.

Answer 3

有时，在处理长字符串时，使用 var_dump 可能会非常乏味。您可以使用终端，而不是在浏览器上输出结果。另一种解决方案是使用 file_put_contents 或类似的方法将结果输出到文本文件中。然后打开文件查看结果。

如何在 PHP 中使用 var_dump() 查看长字符串的完整内容

How to see full content of long strings with var_dump() in PHP

php

arrays

var-dump