PHP Cheat Sheet
| Year | Month | Day | Week | ||||||||
| Y | → 2019 | m | → 01 | d | → 01 | W | → 1-52 | ||||
| y | → 19 | n | → 1 | j | → 1 | ||||||
| F | → January | I | → Monday | ||||||||
| L | → leap? | M | → Jan | D | → Mon | ||||||
| t | → 28-31 | ||||||||||
| S | → th | ||||||||||
| N | → 1-7 | ||||||||||
| z | → 1-365 | ||||||||||
| Hour | Minutes | Seconds | |||||||||
| H | → 01-24 | i | → 00 | s | → 00 | ||||||
| h | → 01-12 | ||||||||||
| G | → 1-24 | ||||||||||
| g | → 1-12 | ||||||||||
| a | → am/pm | ||||||||||
| A | → AM/PM | ||||||||||
| B | → 999 | ||||||||||
| e | → UTC | ||||||||||
| Y-m-d H:i:s | → 2019-02-04 14:00:00 |
| n/j/Y g:i a | → 2/4/2019 2:00 pm |
| F jS Y | → February 4th 2019 |
| F jS, Y | → February 4th, 2019 |
| g:i a | → 2:05 pm |
| H:i:s | → 14:05:00 |
| MySQL | Replace( FIELD, ‘find’, ‘replace’) |
| PHP | str_replace( ‘old’, ‘new’, $FIELD ) |
| strpos( $HAYSTACK, ‘needle’ ) | |
| in_array( ‘needle’, $HAYSTACK ) |
| MySQL Integer Sizes | ||||
|---|---|---|---|---|
| Type | Size | Bytes | Signed | Unsigned |
| BIGINT | (21) | 8 | 9,223,372,036,854,775,808 | 18,446,744,073,709,998,080 |
| INT | (11) | 4 | 2,147,483,647 | 4,294,967,295 |
| MEDIUMINT | (7) | 3 | 8,388,607 | 16,777,215 |
| SMALLINT | (5) | 2 | 32,767 | 65,535 |
| TINYINT | (3) | 1 | 127 | 255 |
