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Xdebug and var_dump

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[开发(php) 所属分类 开发(php) | 发布者 店小二04 | 时间 2016 | 作者 红领巾 ] 0人收藏点击收藏

If you are using Xdebug withphp and are using the var_dump function it is important to note that Xdebug will limit var_dump ‘s depth when dumping information about a variable. By default this limit is 3 and can easily be identified by the ellipsis that are added to var_dump ‘s output:

object(Illuminate\Support\Collection)[135] protected 'items' => array (size=2) 0 => object(Illuminate\Support\Collection)[133] protected 'items' => array (size=3) ... 1 => object(Illuminate\Support\Collection)[134] protected 'items' => array (size=3) ...

This Xdebug setting can be configured via the php.ini file (as explained in Xdebug’s documentation section “xdebug.var_display_max_depth” ). Luckily for us, this configuration value can be modified using PHP’s init_set function, so it can be changed whenever we want during a script’s execution:

<?php // Change var_dump's depth when using Xdebug: ini_set('xdebug.var_display_max_depth', '10');

Now var_dump will output all the information we were originally looking for:

object(Illuminate\Support\Collection)[135] protected 'items' => array (size=2) 0 => object(Illuminate\Support\Collection)[133] protected 'items' => array (size=3) 0 => string '1' (length=1) 1 => string '2' (length=1) 2 => string '3' (length=1) 1 => object(Illuminate\Support\Collection)[134] protected 'items' => array (size=3) 0 => string '4' (length=1) 1 => string '5' (length=1) 2 => string '6' (length=1) Conclusion

If you are having difficulties displaying all the information you need when using the var_dump function and you have Xdebug installed and enabled, it is more than likely a configuration value you missed. Modify the xdebug.var_display_max_depth configuration value as needed to display all the information needed.

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