In-depth analysis of the foreach function in php _ PHP Tutorial

In-depth analysis of the foreach function in php. The Foreach function (PHP4PHP5) foreach syntax structure provides a simple way to traverse arrays. Foreach can only be applied to arrays and objects. Foreach function (PHP4/PHP5)
ForeachThe syntax structure provides a simple way to traverse arrays.
ForeachIt can only be applied to arrays and objects. if you try to apply it to a variable of another data type, or if the variable is not initialized, an error message is sent.

There are two syntaxes:

The code is as follows:

Foreach (array_expression as $ value)
Statement
Foreach (array_expression as $ key => $ value)
Statement

Example 1:

The code is as follows:

$ Arr = array (1, 2, 4 );
Foreach ($ arr as $ value ){
Echo $ value ."
";
}
?>

Example 2:

The code is as follows:

$ Arr = array (1, 2, 4 );
Foreach ($ arr as $ key => $ value ){
Echo $ key. "===>". $ value ."
";
}
?>

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