Ideas in this flowchart

• Iterating over PHP arrays according to their key structure
• A normal for loop applies when the array is zero-indexed and all elements are contiguous
• The for loop iterates by incrementing an index variable
• The loop starts at zero, continues while the index is below count($arr), and increments the index
• Example: for($i=0; $i<count($arr); $i++) { print $arr[$i]; }
• The for loop fails with associative arrays containing mixed key types or holes in integer indexing
• Foreach loops are more reliable for arrays with irregular keys
• A foreach loop can be used in several ways
• The most general form uses double-arrow notation to iterate over each key-value pair