PHP JS
(quick examples)
PHP VARIABLE <?php $pv = "Foo"; ?>
ECHO JAVASCRIPT CODE <?php echo "var jv = '$pv';"; ?>
SHORT ECHO TAG TO “INSERT VALUE” var jv = "<?=$pv?>";
INSERT INTO HTML FORM <input type="text" id="txt" value="<?=$pv?>">
PHP VARIABLE <?php $pv = "Foo"; ?>
JS GET FIELD VALUE var jv = document.getElementById("txt") .value;
PHP CONVERT ARRAY TO STRING <?php $pv = json_encode(["A", "B", "C"]); ?>
JAVASCRIPT CONVERT STRING TO ARRAY var jv = JSON.parse('<?=$pv?>');
JS AJAX FETCH DATA FROM PHP fetch("SCRIPT.PHP") .then(res => res.text()) .then(data => console.log(data));
PHP OUTPUT VALUE $pv = "Foo"; echo $pv;
PHP JSON OUTPUT echo json_encode(["A", "B", "C"]]);
JS AJAX FETCH DATA FROM PHP fetch("SCRIPT.PHP") .then(res => res.json()) .then(data => console.log(data));