Use zend_string_init_fast() for single-character string creation (php#21438)

arshidkv12 · web-flow · commit a5ffcf3b1a10 · 2026-03-14T10:50:21.000+01:00
diff --git a/Zend/Optimizer/sccp.c b/Zend/Optimizer/sccp.c
@@ -402,7 +402,7 @@ static inline zend_result ct_eval_fetch_dim(zval *result, zval *op1, zval *op2,
 			return FAILURE;
 		}
 		if (index >= 0 && index < Z_STRLEN_P(op1)) {
-			ZVAL_STR(result, zend_string_init(&Z_STRVAL_P(op1)[index], 1, 0));
+			ZVAL_CHAR(result, Z_STRVAL_P(op1)[index]);
 			return SUCCESS;
 		}
 	}

Original file line number	Diff line number	Diff line change
`@@ -402,7 +402,7 @@ static inline zend_result ct_eval_fetch_dim(zval result, zval op1, zval *op2,`
`402`	`402`	`return FAILURE;`
`403`	`403`	`}`
`404`	`404`	`if (index >= 0 && index < Z_STRLEN_P(op1)) {`
`405`		`- ZVAL_STR(result, zend_string_init(&Z_STRVAL_P(op1)[index], 1, 0));`
	`405`	`+ ZVAL_CHAR(result, Z_STRVAL_P(op1)[index]);`
`406`	`406`	`return SUCCESS;`
`407`	`407`	`}`
`408`	`408`	`}`