wp-includes/functions.php:7791Attempts to raise the PHP memory limit for memory intensive processes.
$contextstringoptional'admin'int|string|false4 hooks fire while wp_raise_memory_limit() runs, in this order:
Filters the maximum memory limit available for administration screens.
Filters the memory limit allocated for image manipulation.
Filters the memory limit allocated for WP-Cron event processing.
Filters the memory limit allocated for an arbitrary context.
function wp_raise_memory_limit( $context = 'admin' ) { // Exit early if the limit cannot be changed. if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) { return false; } $current_limit = ini_get( 'memory_limit' ); $current_limit_int = wp_convert_hr_to_bytes( $current_limit ); if ( -1 === $current_limit_int ) { return false; } $wp_max_limit = WP_MAX_MEMORY_LIMIT; $wp_max_limit_int = wp_convert_hr_to_bytes( $wp_max_limit ); $filtered_limit = $wp_max_limit; switch ( $context ) { case 'admin': /** * Filters the maximum memory limit available for administration screens. * * This only applies to administrators, who may require more memory for tasks * like updates. Memory limits when processing images (uploaded or edited by * users of any role) are handled separately. * * The `WP_MAX_MEMORY_LIMIT` constant specifically defines the maximum memory * limit available when in the administration back end. The default is 256M * (256 megabytes of memory) or the original `memory_limit` php.ini value if * this is higher. * * @since 3.0.0 * @since 4.6.0 The default now takes the original `memory_limit` into account. * * @param int|string $filtered_limit The maximum WordPress memory limit. Accepts an integer * (bytes), or a shorthand string notation, such as '256M'. */ $filtered_limit = apply_filters( 'admin_memory_limit', $filtered_limit ); break; case 'image': /** * Filters the memory limit allocated for image manipulation. * * @since 3.5.0 * @since 4.6.0 The default now takes the original `memory_limit` into account. * * @param int|string $filtered_limit Maximum memory limit to allocate for image processing. * Default `WP_MAX_MEMORY_LIMIT` or the original * php.ini `memory_limit`, whichever is higher. * Accepts an integer (bytes), or a shorthand string * notation, such as '256M'. */ $filtered_limit = apply_filters( 'image_memory_limit', $filtered_limit ); break; case 'cron': /** * Filters the memory limit allocated for WP-Cron event processing. * * @since 6.3.0 * * @param int|string $filtered_limit Maximum memory limit to allocate for WP-Cron. * Default `WP_MAX_MEMORY_LIMIT` or the original * php.ini `memory_limit`, whichever is higher. * Accepts an integer (bytes), or a shorthand string * notation, such as '256M'. */ $filtered_limit = apply_filters( 'cron_memory_limit', $filtered_limit ); break; default: /** * Filters the memory limit allocated for an arbitrary context. * * The dynamic portion of the hook name, `$context`, refers to an arbitrary * context passed on calling the function. This allows for plugins to define * their own contexts for raising the memory limit. * * @since 4.6.0Introduced in 4.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.