It is unfortunately easy to program in PHP in a way that consumes memory faster than you realise. Copying strings, arrays and objects instead of using references will do it, though PHP 5 is supposed to do this more automatically than in PHP 4. But dealing with your data set in entirety over several steps is also wasteful compared to processing the smallest logical unit at a time. The classic example is working with large resultsets from a database: most programmers fetch the entire resultset into an array and then loop over it one or more times with foreach(). It is much more memory efficient to use a while() loop to fetch and process one row at a time. The same thing applies to processing a file.

如果您试图读取一个文件，这将占用PHP中的内存。例如，如果您试图打开并读取一个MP3文件(例如，$data = file("http://mydomain.com/path/sample.mp3"))，它将把它全部拉到内存中。

正如Nelson所建议的，如果您确实需要使用这么多内存，您可以提高您的最大内存限制。

在Wordpress中切换到一个新主题后，我收到了同样的错误信息。PHP运行的是5.3版本，所以我切换到了7.2。这解决了问题。

Wordpress用户添加一行:

@ini_set('memory_limit', '-1');

or

在cpanel中设置memory_limit为-1

It is unfortunately easy to program in PHP in a way that consumes memory faster than you realise. Copying strings, arrays and objects instead of using references will do it, though PHP 5 is supposed to do this more automatically than in PHP 4. But dealing with your data set in entirety over several steps is also wasteful compared to processing the smallest logical unit at a time. The classic example is working with large resultsets from a database: most programmers fetch the entire resultset into an array and then loop over it one or more times with foreach(). It is much more memory efficient to use a while() loop to fetch and process one row at a time. The same thing applies to processing a file.

我们也遇到过类似的情况，我们尝试了顶部给出的答案 报错(' memory_limit ', ' 1 '); 一切工作正常，压缩图像文件大于1MB到KBs。