Some techniques used in PHP development

PHP Batch Gets the value of the checkbox

1, naming

The following are the referenced contents: <input type= ' checkbox ' name= ' checkbox[] ' value= $dwmyrow [Banzhu]/>

2. Use

When the plan is treated as part of the SQL directive: if the field that participates in the control is numeric, the

The following are the referenced contents: if (! empty ($_post[' checkbox ')) { $expr = Join (",", $_post[' checkbox ')); $sql = "SELECT * from Tbl_name where field in ($expr)"; } If the field participating in the control is numeric, the if (! empty ($_post[' checkbox ')) { $expr = "'". Join ("', '", $_post[' checkbox ']). "."; $sql = "SELECT * from Tbl_name where field in ($expr)"; }

PHP determines whether form forms are submitted

The following are the referenced contents: $action = $HTTP _post_vars["Button1"]; if ($action = = "Submit") { To perform a form operation } Else { Reading default values } PHP gets string length Strlen ($myrow [1]) PHP URL Turn Header ("Location:". $_server["Http_referer"]);

PHP Hyper Global Objects

The following are the referenced contents: <?php $a = 1; $b = 2; function Sum () { $GLOBALS ["b"] = $GLOBALS ["a"] + $GLOBALS ["B"]; } Sum (); Echo $b; ?>

PHP form Values

The following are the referenced contents: If mothod= "get" replaces $test with $_get["test" If mothod= "POST", replace $test with $_post["test" PHP Gets the current IP <?= $HTTP _server_vars["REMOTE_ADDR"]?> PHP Gets the current time <?php echo Date ("y-m-d g:i:s"); ?> Date ("Y year M month D Day") Date ("Y-n-j")