OSX: it may not be a good idea to enable the ssd trim function.
A long time ago, since people started loading SSD to Mac machines and OSX began to support TRIM, people began to pay attention to enabling the TRIM function of OSX to optimize SSD
To remove the left space function in MySQL:
LTRIM (str)
Returns the string str with leading space characters removed.
The following is a code fragment:
Copy Code code as follows:
mysql> SELECT LTRIM (' Barbar ');
-> ' Barbar '
Remove the left space function from the powerful mysql trim () function bitsCN. commysql:
LTRIM (str)
Returns the string str with leading space characters removed.
The following is a code snippet:
Mysql> select ltrim ('barbar ');
-> 'Barbar'
Don ' t let the name fool you, Photos for OS X also stores all your videos.Whether synced them from your iPhone or iPad usingicloud Photo Library or imported the manually, all your movie moment S is right there alongside your images. Editing,
Validating form data with PHP
The first thing we want to do is pass all the variables through the PHP htmlspecialchars () function.
After we use the Htmlspecialchars () function, if the user tries to submit the following in the text field:
-The
How php processes the data submitted by forms is safe. What processing is required for the form data submitted by users to prevent js and SQL injection, prevent repeated submission and illegal submission to filter out the submitted illegal data.
Security | data | database | display
For example have styledesc this field, the data request is 50 bits, char shape, can limit him only 50 bits, other not limit, enter any character to be possible. As long as it's char, it's OK as long as the
How php processes the data submitted by forms is safe. What processing is required for the form data submitted by users to prevent js and SQL injection, prevent repeated submission and illegal submission to filter out the submitted illegal data.
Dedecms is very powerful, but there are always some things that cannot meet our own needs. Therefore, we need to use the flag when designing the template to write the program, it is also inevitable to query, update, and modify the database. However,
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