我想分享我在这个问题上的经验!

假设你有a类和B类。

class A {
    protected $userB;

    public function __construct() {
        $this->userB = new B();
    }
}

class B {
    protected $userA;

    public function __construct() {
        $this->userA = new A();
    }
}

这将启动一个对象链的形成，这可能会产生这种问题!

I was also having the same problem, looked for phpinfo.ini, php.ini or .htaccess files to no avail. Finally I have looked at some php files, opened them and checked the codes inside for memory. Finally this solution was what I come out with and it worked for me. I was using wordpress, so this solution might only work for wordpress memory size limit problem. My solution, open default-constants.php file in /public_html/wp-includes folder. Open that file with code editor, and find memory settings under wp_initial_constants scope, or just Ctrl+F it to find the word "memory". There you will come over WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT. Just increase it, it was 64 MB in my case, I increased it to 128 MB and then to 200 MB.

// Define memory limits.
if ( ! defined( 'WP_MEMORY_LIMIT' ) ) {
    if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
        define( 'WP_MEMORY_LIMIT', $current_limit );
    } elseif ( is_multisite() ) {
        define( 'WP_MEMORY_LIMIT', '200M' );
    } else {
        define( 'WP_MEMORY_LIMIT', '128M' );
    }
}

if ( ! defined( 'WP_MAX_MEMORY_LIMIT' ) ) {
    if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
        define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
    } elseif ( -1 === $current_limit_int || $current_limit_int > 268435456 /* = 256M */ ) {
        define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
    } else {
        define( 'WP_MAX_MEMORY_LIMIT', '256M' );
    }
}

顺便说一句，请不要做下面的代码，因为这是不好的做法:

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

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。

Wordpress用户添加一行:

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

or

在cpanel中设置memory_limit为-1

COMPOSER_MEMORY_LIMIT=-1 composer require mageplaza/module-core

如果你想读取大文件，你应该一点一点地读取，而不是一次读取。 这是一个简单的数学:如果您一次读取一个1mb大的文件，那么同时至少需要1mb的内存来保存数据。

所以你应该使用fopen & fread一点一点地阅读它们。